chef vs cook

chef and cook both are nouns.

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

As nouns, cook is a hypernym of chef; that is, cook is a word with a broader meaning than chef:

chef (noun)	cook (noun)
a professional cook	someone who cooks food

chef (verb)	cook (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