cook vs stew

cook and stew both are nouns.

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

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

cook (noun)	stew (noun)
someone who cooks food	food prepared by stewing especially meat or fish with vegetables
	agitation resulting from active worry

cook (verb)	stew (verb)
transform and make suitable for consumption by heating	cook slowly and for a long time in liquid
transform by heating	bear a grudge; harbor ill feelings
prepare for eating by applying heat	be in a huff; be silent or sullen
prepare a hot meal
tamper, with the purpose of deception