cook vs cooky

cook and cooky both are nouns.

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

As nouns, cooky is a hyponym of cook; that is, cooky is a word with a more specific, narrower meaning than cook:

Other hyponyms of cook include chef, cookie, fry cook, preserver, roaster, seasoner.

cook (noun)	cooky (noun)
someone who cooks food	any of various small flat sweet cakes
	the cook on a ranch or at a camp

cook (verb)	cooky (verb)
transform and make suitable for consumption by heating
transform by heating
prepare for eating by applying heat
prepare a hot meal
tamper, with the purpose of deception