oreo vs cooky

oreo and cooky both are nouns.

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

As nouns, cooky is a hypernym of oreo; that is, cooky is a word with a broader meaning than oreo:

Other hypernyms of oreo include biscuit, cookie.

oreo (noun)	cooky (noun)
chocolate cookie with white cream filling	any of various small flat sweet cakes
	the cook on a ranch or at a camp