Plural form of keyword

[Jordo needs a drink]

I just noticed I'm ranking on the 1st page for the plural form of a keyword for one of my sites.

The deal is, I don't have the plural form anywhere on the page that is ranking.

The other interesting thing is that I don't rank on the 1st page on the singular form. The singular form of the keyword is on the page that is being ranked for the plural form.

[M_Bison]

does the plural form appear in links to the page?

look at the google cache for the page and that will tell you.

[BeeDeeDubbleU]

I would agree that this is probably because of inbound links.

If you do a search for "computers" you will always find companies like Dell and Apple near the top of the results but the word computers does not appear on their home pages.