biscuit vs cooky

biscuit and cooky both are nouns.

Word	Noun	Adjective	Verb	Adverb
biscuit	Yes	No	No	No
cooky	Yes	No	No	No

As nouns, biscuit and cooky are synonyms defined as:

Other synonyms of biscuit include cookie.

biscuit (noun)	cooky (noun)
small round bread leavened with baking-powder or soda	any of various small flat sweet cakes
any of various small flat sweet cakes	the cook on a ranch or at a camp