What place does plural versions of keywords have in keyword research?

[ShockoeCommerce]

Working on doing a massive keyword research project for my sites, one of the things I am trying to figure out is if I should be including plural versions of keywords. For example, should you include yoga mat as well as yoga mats?

[LoganRay]

Hi Alex,

Google views plurals as synonymous, so those 2 keywords will (almost always) have the same rank. Nonetheless, I still like to include them in my keyword monitoring, just to have a more granular level of visibility on what keywords the site is ranking for.