cook vs concoct

cook is a noun but concoct is not a noun.

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

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

cook (noun)	concoct (noun)
someone who cooks food

cook (verb)	concoct (verb)
transform and make suitable for consumption by heating	make a concoction (of) by mixing
transform by heating	devise or invent
prepare for eating by applying heat	prepare or cook by mixing ingredients
prepare a hot meal	invent
tamper, with the purpose of deception