Ultimate Guide to LSI Keywords: Improve Google Ranking Using LSI Keywords

Today's topic is all about LSI keywords and how you can rank on Google #1 spot using LSI keywords.

​When it comes to ranking on Google, understanding how LSI keywords work will make your site rank higher on Google. The usage of LSI keywords should be incorporated in the process of optimizing your site for SEO.

​Here's a snippet of what you will get in this article:​

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    ​Introduction to LSI keywords (what is LSI keywords?)
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    ​Why is LSI keywords important for SEO?
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    ​How to use LSI keywords to rank on first page of Google

​I will be joking if I say that this Ultimate ​LSI Keywords Guide explains just the three points above. Take a look at the table of content below for more snippet of this ultimate guide.

​What is LSI Keywords?

lsi keyword guide 2018

​Latente Semantic Indexing or LSI in short, is an effective but least-known method to improve your on-page optimization.

​If you have not heard about LSI keywords or don't know much about the term, this ​Ultimate​ L​SI Keywords Guide will help you improve your knowledge and ultimately, help you improve Google ranking.

The relationship between ​LSI keywords and keyword density

​It is surprising that a lot of people confuse with this matter. Keyword density is the number of times a word (or a string of words) appears in your text. For your information, Keyword Density (also known as "KD") is measured in percentage.

​The bigger the percentage of the keyword density, the better the chances for you to rank on Google for your selected keyword.

But this was those good old days.

Before Google Panda and Hummingbird update, keyword density and the right amount of keyword stuffing will rank your page easily. Google understands that this leads to inaccurate, low quality content which affects the user's experience when using Google. Thus, new algorithms are created and launched to ensure that only the best content is visible on the first few pages of Google.

What is keyword stuffing?

​Keyword stuffing is a process where you place the keywords multiple time on a web page to trick search engine into ranking the page higher than it otherwise might.

Keyword stuffing is often practice without considering the impact of readability and user's experience.

​But keyword stuffing worked for years

​In order to boost your site's rank, all you have to do was to include the primary keyword in the page titles, META descriptions, META keywords and overuse it all over your content.

​After several Google updates such as Google Panda and Google Hummingbird in recent years, keyword stuffings doesn't work anymore. While it does carry some weight in ranking, more factors are taken into consideration as well.

​Ultimate Guide to LSI Keywords keyword density recommendation: Keyword density should be anywhere between 2 to 3% at ​most.

​So, does keyword density still matters today?

​If you want a short answer, it is "Yes."

​Even though keyword stuffing is considered obsolete, keyword density still matters and here's why.

The table below is taken from a search query using the Free Keyword Density Analyzer Tool from SeoBooks.com.

what is lsi keywords

​I got to agree that the report certainly looks ugly. But the data collected from it is pretty amazing.

​Here are some important takeaway from the report above:


​Most used keywords

How the usage of ​LSI, keyword, keywords, search, SEO, Google and 10 other keywords impacts the top 10 highest ranking web pages?


​Average keyword density

​Taking important notes on the average keyword density for each keyword of the top 10 ranking web pages


​Number of times each keywords are mentioned

​This is pretty straight forward. The table shows the number of times each keywords are mentioned and you can see the impact of it on the top ranking pages.


​Average content length

​The importance of having detailed content is critical for ranking. ​If you want to rank higher on Google, start writing lengthy content!

​When it comes to ranking and search engine optimization, always remember that SEO is all about finding the right patterns, analyzing them thoroughly, and obtaining actionable data. All of these will help you rank faster and higher on Google.

WORTH READING: The Ultimate KWFinder Review (Is KWFinder really that powerful?

​Ultimate LSI Keywords Guide—Getting Started

​LSI keywords may sound complicated but trust me, it isn't. LSI keywords are keyword phrases that are similar in meaning when compared to the primary keywords.

LSI keywords are not limited to synonyms and these are keywords that are commonly found together (keywords people often searched for).

​For easier understanding on what LSI keywords are, ​I'm taking "bikes" as the primary keyword. Here are some LSI keywords that come along with that keyword:

  • ​Comfort bikes
  • ​Hybrid bikes
  • ​Mountain bikes
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    Top bicycle brands
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    Bike size calculator

​As you can see, you don't have to write about "bikes" only and the usage of LSI keywords allow you to write about other relevant and highly related topics.

Of course, this brings us to a very interesting topic.

​How do search engine algorithms know which topic you are writing about?

​The answer is using sufficient LSI keywords within your article. When Google bot or other search engine crawlers crawl your site, they will look not only for the primary keywords but keywords which are related to it. In this case, having multiple LSI keywords is going to send the right signal to the crawlers on ​the content you are writing.

Ultimately, search engines will understand your site better and send the right audience to your content.

​LSI keywords can be complicated and messy business as there are many terms related to Latent Semantic Indexing. Here's a list for you to start with:

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    ​Latent Semantic Analysis
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    ​Natural Language Processing
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    ​Phrase-Based Indexing and Retrieval
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    Term Frequency-Inverse Document Frequency
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    Latent Dirichlet Allocation
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    Probabilistic Latent Semantic Analysis
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    Hidden Topic Markov Model
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    Latent Dirichlet Allocation
latent semantic indexing

Yes, I know that "What the hell" feeling. LSI keywords can be really complicated. Well, it is understandable since SEO is forever changing, right?

​If you are feeling adventurous and want to dive deeper into Latent Semantic Indexing, here are additional SEO resources that you can take a look at:

​How to find LSI keywords?

​Here comes the juicy part to find LSI keywords. There are four quick ways to find for LSI keywords which are:

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    ​Google ​Autocomplete/Google Instant Search
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    Results from the ​"Searches related to"
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    ​Results from the bold words in SERP results
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    Other keyword research tools

​1. Find LSI keywords using Google ​Autocomplete/Instant Search

​Google autocomplete or instant search is a great way to find for LSI keywords. 

​To start finding LSI keywords, search for a specific keyword on Google search and a list of related keywords will be show up.

This is what I mean:

google instant search

Google Instant Search will give you a list of related keywords (LSI keywords) that you can use

​It is important to note that you should perform additional keyword research to remove unrelated keywords.

​BONUS TIP: How to use KWFinder to determine the profitability and competitiveness of a LSI keyword?

​2. Find LSI keywords using the "searches related to" feature

​Google provides related keywords at the bottom of the search page. Typically, you will find up to 8 additional keyword suggestions that you can add into your LSI keyword research.

google related search keywords

Google provides a list of related :LSI keywords on the bottom of the search results page

​3. Find LSI keywords using bolded words on Google search result pages (SERP)

​Do you notice several words are bolded when you perform searches on Google?

bolded words on Google SERP

Pay attention to the words that are bolded on Google SERP

​As you can see, searching for the primary keyword "laptop repair" leads to additional LSI keywords such as notebook, computer and repair term in general.

​4. Find LSI keywords using SEO tools

​In the SEO industry, there are hundreds of SEO tools that you can use to find LSI keywords. I'm only going to share with you the tools that I personally use to find LSI keywords.

​Google Adwords and Google Keyword Planner

​Google Adwords is pretty straightforward and easy to use — even if you are not using Google Ads.

When you use Google Adwords, navigate to Google Keyword Planner to start doing your keyword research. There are two features you should put serious consideration on:

  • ​Ad group ideas
  • ​Keyword ideas

​This is what ad group ideas look like:

google adwords group ideas

​While it is entirely fine to use Google Adwords and Google Keyword Planner to find for LSI keywords, I got to agree that the display isn't world class. In most cases, it can be really confusing and complicated for beginners. 

Carry on below to find more alternatives and SEO tools that I use (and recommend).

​​​Keyword ideas

​Another very simple way to find for LSI keywords is by using Google Keyword Planner's keyword ideas.

find related keywords using google keyword planner


​LSIGraph or LSI keyword generator is a popular tool to use. It doesn't only gives you a long list of LSI keywords, it is also free to use!

how to use LSIGraph

Generate a list of LSI keywords based on your primary keyword

​​SEOPressor SEO plugin

SEOPressor is an on-page SEO plugin that helps you optimize your site in just a few clicks. This is a premium SEO plugin that starts at $5 per month and leverages the power of LSI keywords (minus the hassle).

what is SEOpressor

Besides finding for LSI keywords, SEOPressor also helps you to perform multiple keyword analysis, over-optimization check, social SEO integration and structure data support. 

​Want to rebounce bounce rate?

​Most website owners are suffering from high bounce rate (as high as 80%) and one of the best way is to create strong internal linking on your site. This helps to reduce bounce rate and at the same time, pass ranking/authority flow to your articles within your site. SEOPressor comes with smart linking feature and you can put backlinking on automation!


​I love KWFinder because it is by far the best keyword research tool I've used. Seriously.

KWFinder is not only an affordable keyword research tool, it helps you to generate a full list of LSI keywords in just a few seconds. You can read my full review on KWFinder here.

find related keywords using KWFinder

​Using KWFinder, I'm able to search up to 700 related keywords (or LSI keywords) along with other data such as keyword competitiveness and number of searches in a month.

If KWFinder isn't right for you (for whatever reasons, here are 7 KWFinder alternatives you can use to find long tail keywords and optimize on-page SEO to improve Google ranking.


​SEMrush is often considered a great SEO tool (and KWFinder alternative). SEMrush doesn't only offer keyword research and link monitoring, you can also use SEMrush to find for related keywords.

semrush related keywords

​Using SEMrush, you can easily find related and LSI keywords in just a few clicks. Plus, SEMrush comes with relevancy score (in percentage) and other metrics which could be very important for your SEO campaign.

​At the same time, SEMrush also provides keywords density (marked as "KD") and it ranged from 0 to 100 (100 being the hardest to rank).

​Is LSI keywords synonyms?

​The answer is yes and no.

LSI keywords are and are not synonyms at the same time. As a matter of fact, they can be closely related and relevant terms to the primary keyword.

Imagine you write an article about LSI keywords (like this post) and you want to know which terms you should include in order to rank higher on Google SERPs.

Let's run the sentence "Onpage SEO" using Keys4Up.

find lsi keywords using keys4up

​As you can see, LSI keywords generated from Keys4Up is decent and very limited. Of course, you can toggle between 1 word, 2 words or 3 words using Keys4Up.

Now, let's take a second look at the results generated from SEMrush related keywords search.

semrush related keywords

Now, this is what it looks like on KWFinder.

find related keywords using KWFinder

​Do you notice that SEMrush and KWFinder provide more detailed and longer keywords (a.k.a. long tail keywords)?

​Important note from the editor

Using the primary keyword of "onpage SEO," ​SEMrush generated 612 LSI keywords ​and KWFinder generated 700 LSI keywords. ​Based on value for money, KWFinder is a much better keyword research tool as it is more affordable and has a low learning curve. ​Click here to try SEMrush or KWFinder for free.

​Ultimate guide to LSI keywords recommendations: Using the right keyword research tools such as SEMrush and KWFinder, we ​are able see a ​detailed list of keywords which are highly related and at the same time, providing keywords that give us different vantage points.

Summary: ​Ultimate Guide to LSI Keywords

​Using LSI keywords is an important step in ensuring that our site ranks well on Google SERP.

If you are writing about SEO, make sure that your contenthas both primary and LSI keywords in it. In this case, LSI keywords can be onpage SEO, SEO marketing, Google SEO, SEO analysis and website ranking.

By using LSI keys sparingly in your content, you are sending the right signals to web crawlers on your content.

​BONUS: How to use LSI keywords in writing?

​When it comes to implementing LSI keywords, you need to remember that the right usage of LSI keywords is going to improve your on-page SEO and organic ranking.

Here are some of the main focus areas where you should be using your LSI keywords:

  • ​Page title
  • ​H1 and H2 tags (H3 is fine too)
  • ​URL address
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    META tags
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    Images alt-text
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    First paragraph of ​the article (along with your primary keyword)
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    Within the content body
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    Links anchor texts
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    Last paragraph of the article

How to use LSI keywords to improve onpage SEO?

The right step is to sprinkle LSI keywords only after you have completed your article writing. By doing so, your writing will be more readable and focused towards your website visitors.

​Lastly, the keyword density for LSI keywords should not be more than your primary keyword.

KWFinder Alternative: 7 Free And Paid Tools To Improve Ranking On Google

​You read my KWFinder review and while you think KWFinder is a good keyword research tool, it may not be a good fit for you. So, what is the best KWFinder alternative?

Before that, I want to say the KWFinder is probably the best keyword research tool that you can ever find. For only $29.90 a month, you can find long tail keywords faster and more effectively. And even if you think that KWFinder may not be a good fit for you, don't forget to sign up for a free account.

​What is the best KWFinder alternative?

​Let me guess. You probably doesn't want to spend the money (don't worry, I get it) or you looking for a more complete tool that fits your need.

So, here is a list of great keyword research tools that you can use today.

​Long Tail Pro — The Forgotten KWFinder Alternative

​When I started blogging in 2004, SEO was much easier and most of us are not using keyword research tool.

Well, it makes sense. Anyone can improve ranking on Google simply by stuffing keywords and abusing the meta keywords. Nowadays, you need to have a complete strategy such as ​improving your content to rank higher on Google.

And don't forget that Google ranking is also affected by the way you optimize your entire site for SEO. ​

​Don't worry if you have no idea on where to start or how to start optimizaing your site for search engine. Read this guide to help you get started.

​Back to the topic.

​Long Tail Pro had went off the radar back in 2016 after the acquisition.

Yes, while Long Tail Pro is still available today, it is no longer under the same owner. ​This tool was developed and launched by Spencer Haws from Niche Pursuits (more bio about him here).

Long Tail Pro is a good KWFinder alternative because:

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    ​Long Tail Pro ​has low learning curve
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    ​Powerful keyword research tool and features
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    ​Find profitable long tail keywords in just a few clicks
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    ​Easily ​sort profitable keywords through powerful keyword difficulty system
long tail pro keyword research

Find profitable keywords easily through Keyword Competitiveness (KC) metric

​Keyword research is often a challenging task and Long Tail Pro makes the entire process much easier for you.

features on long tail pro

Long Tail Pro provides detailed information such as top 10 result from Google, average keyword competitiveness, and monthly search volume.

Advantages using Long Tail Pro:

  • ​Easy to use
  • ​Cloud-based system
  • ​Scores high in affordability
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    ​Low learning curve
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    ​Powerful keyword research system
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    Doesn't take forever to load

Disadvantages using Long Tail Pro:

  • The starter plan comes ​10,000 keywords searches is only fitted for beginners and newbies

​How much does Long Tail Pro costs?

long tail pro pricing

Get 33% discount on Long Tail Pro when you go for annual pricing

​The starter plan on Long Tail Pro is priced at $25 per month when you opt for annual payment.

​Note from the editor

​The entry level for Long Tail Pro offers up to 10,000 keywords searches in a month. This quota is refreshed every 30 days.​

​Long Tail Pro is a great KWFinder alternative as the entry level costs $25 per month. Plus, it comes with 10,000 keywords research which is ample for beginners.

​LSIGraph — KWFinder Alternative When Finding For LSI Keywords

​According to Quora, LSI (Latent Semantic Indexing) are basically keywords that are semantically related to your primary keyword. Contrary to popular belief, they are NOT just synonym or keywords that are similar in meaning.

how to use LSIGraph

Generate a list of LSI keywords based on your primary keyword

LSIGraph is a free keyword research tool that allows you to search for relevant keywords in just a few clicks.

​Not only that LSIGraph is highly effective in keyword research and SEO strategy, it is extremely easy to use as well!

what is LSIGraph

Proper usage of LSI keywords will help you rank your site on Google

​LSIGraph isn't entire a good KWFinder alternative as it is not able to calculate the keyword competitiveness. However, it is still able to provide you with strings of keywords that you could use to rank on Google.

After all, Google hates abusers who use keyword stuffing!

Advantages using LSIGraph:

  • Easily find long tail keywords
  • Very fast and quick response (close to zero waiting/loading time)
  • ​Free to use

The only downsite of using LSIGraph is that it doesn't provide other forms of data such as number of searches and keyword difficulty.

Nonetheless, I still recommend you to use this to optimize your site for SEO. You can check out LSIGraph here.

​KeywordTool.io — Free​ & Premium KWFinder Alternative

​If you are looking for a keyword research tool to find keywords to rank on Google, YouTube, Bing, Amazon, eBay and App Store, you don't have to look further.

Introducing KeywordTool.io.

This keyword tool is best when you are looking to generate keyword suggestions based on different media and platforms. KeywordTool.io is considered the best KWFinder alternative because it provides close to 100% accuracy Google search volume.

find long tail keywords using keywordtool.io

You can search for relevant keywords with limited features (with the free account)

​Advantages using KeywordTool.io:

  • ​Free to use
  • ​Search keywords on multiple platforms
  • ​Data are relevant and trusted

Of course, the downside of this tool compared to KWFinder is that it lacks the search volume and competition level in the free account.

​While KeywordTool.io is often considered a good alternative, the pricing structure may turn many people off.

keywordtool.io review

KeywordTool.io pricing structure

​If you can see, KeywordTool.io starts at $88 per month and you can save up to $211 when you go for annual subscription. The entry level pricing is very steep and may not be the best choice for beginners or bloggers.

However, there is still no denial that the free KeywordTool.io is able to perform pretty decent keyword research.

​S​ERPSTAT — Growth hacking and SEO tool for marketing

SERPSTAT is not your average keyword research tool. I love to consider it as an all-in-one growth hacking and SEO tool.

​And the reasons are simple! With SERTSTATS, you can:

  • ​Find long tail keywords and related keywords in just a few clicks
  • ​Easy to understand detailed ​graphs to analyze the keywords’ trends
  • ​Additional data such as organic keywords, the number of Facebook shares, and the potential traffic score are provided for each competitor's page
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    Batch analyze up to 200 domains at a single go
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    On-page audit feature will tell you how efficient separate elements of your website are and shows the optimization errors
serpstat competitor analysis

The visual on SERPSTAT reports are easy to understand and detailed

​There is only one disadvantage using SERPSTAT — it doens't come with keyword difficulty which all of us dearly need.

In terms of pricing and features, SERPSTAT certainly beats KWFinder out of the park anytime of the day.

serpstat pricing

​If you are looking for SERPSTAT discount, signing up for yearly subscription and get 20% off from your total invoice!

​SpyFu — Steal Competitor Keywords (Faster & Smarter)

​If you want to rank on Google, the most important factor is the keywords. 

Traditionally, keyword research involves finding the best keywords, create content around the keyword and publish it, right?

As SEO is an ever-changing industry, you should take keyword research to a whole new level. By ethically stealing your competitors' keywords, you can now rank faster and spend lesser time in overall keyword research.

This is where SpyFu shine and becoming a great KWFinder alternative.

What does SpyFu does well?

  • ​Organic keywords finder from competitive URLs
  • ​Keyword searches to get strongest long tail keywords
  • ​Track ranking history up to 9 years (WTF?!)
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    In-depth SEO Audit reports
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    Export unlimited data pertaining to backlink results
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    SpyFu allows you to spy on competitor’s PPC campaigns with possible budget and reports

​SpyFu is a freaking awesome keyword research tool because it can be a monstrous tool in the right hands. If you are a geeky SEO guy or have an SEO team, this is one tool you got to use!

You should also use SpyFu if you want your competitors to do the hard work (keyword research) and gaining their data to rank for the keywords.

How much does SpyFu costs?

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​The entry level for SpyFu is affordable and pretty much on par with what KWFinder is offering. The features that come with SpyFu starter plan fits well for bloggers and business owners who want to beat their competitors on Google.

​Wordtracker by Wordstream — Reveal 1000s of longtail keywords in real time

Wordtracker is pretty similar to KeywordTool.io where you are able to search for results on Google, Wordtracker, YouTube and Amazon keyword data ​under one roof. 

wordtracker by wordstream

Search for relevant keywords and SERP easily using Wordtracker

​As you can see above, the dashboard for Wordtracker is very intuitive and packed with data.

You start with a primary keyword and it will display a truckload of data including keyword suggestions and the keyword difficulty.

​Comparing to KWFinder dashboard, the Wordtracker tool is definitely the clear winner here.

wordtracker vs google keyword planner

Do you know that the data collected from Google Keyword Planner is not accurate?

​Google Keyword Planner groups data based on relevant keywords and this makes the data inaccurate in many cases. With Wordtracker, keywords are not groupped together and thus, you are able to get detailed information on the chosen keywords.

So, how much does Wordtracker costs?

wordtracker pricing

​If you are interested to take Wordtracker on a trial run, click on the button below to try it for 7 days free.

​SEMrush — All-in-one competitive intelligence suite

​SEMrush is more than just an SEO tool. It is a competitive intelligence tool that allows you merge data from social media, PPC, website audits and other forms of marketing to give you exact information of your standing.

semrush is KWFinder alternative

This is how SEMrush dashboard looks like

​SEMrush offers snapshot of your project and you can easily dive into each SEO project by clicking on the specific tabs on the left of the screen.

​While I still use KWFinder to find for long tail keywords, I use SEMrush to monitor several aspects of my SEO projects.

Mainly, I love SEMrush's On-Page SEO Checker where it will provide a list of ideas to improve your content. Always remember that improved content will help you improve your ranking on Google.

Advantages using SEMrush:

  • ​All-in-one SEO and marketing tool
  • ​Easy to use and extensive marketing features
  • ​Provides ideas on ways to improve your overall content
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    Tracks your activity on social media
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    Able to monitor the brand name as well

​The only downside of SEMrush is the pricing structure. The entry level pricing is $99.95 per month and it often considered slightly on the higher end for many bloggers.

SEMrush pricing table

​If you are a seasoned blogger or business owner, going for the annual plans will save you up to $800 per year!

​Summary: Finding the best KWFinder alternative

​With today's technology, finding a good keyword research tool to replace KWFinder is pretty simple. From the above article, you have discovered the top 7 KWFinder alternative that are either free or comes with a monthly subscription.

There is no denial that KWFinder is an affordable keyword research tool (​create a free lifetime account here). If you are still tempted to give KWFinder a go, read this KWFinder review that I had just published and who knows?

You may find some gems in it!