How Google treats singular and Plural

[olexisomar]

Hi Folks,

Recently I've been noticed from wordtracker that there are no difference between singular and plural keywords based on search volume. So I was wondering if google doesn't make any difference between plurals and singular keywords?
Also on Google webmaster tool it shows me variants of my keywords and most of the time is the same keyword in plural or singular.

Anyone has any Idea about it. Any comment will be appreciated.
Thanks in advance.

[edhel2005]

sometimes it does sometimes it doesn't no idea why, adwords sometimes treats singular and plural as different things with different search volumes and competition while other times they show the exact same number of searches for both singular and plural even though that's hardly possible to be true
my best advice is to get your data from multiple sources and compare