Is grapes pronoun

The Word grapes is a noun, a plural, common, concrete noun; a Word for a thing.

A pronoun is a Word that takes the place of a noun in a sentence. The pronoun for a single grape is 'it', pronoun for grapes is 'they' for the subject and 'them' for the object of a sentence or clause; for example:

A grape rolled under your chair but I can reach it.

I put the grapes in the yellow bowl. They will look nice on the table and we can eat them with dinner.