Did you know that you can use Google's keyword research tool which suggests keywords "related" to the term/phrase you enter. Also it shows you relative search volume by month and comparatively.
Give it a try here. It's free and no account is required to use it:
https://adwords.google.com/ select/KeywordToolExternal
With Site Related Keywords, the tool tells you what AdSense thinks your site is about and then related keywords.
Give it a try here. It's free and no account is required to use it:
https://adwords.google.com/
With Site Related Keywords, the tool tells you what AdSense thinks your site is about and then related keywords.