pressure-cook vs cook

pressure-cook is not a noun while cook is a noun.

Word	Noun	Adjective	Verb	Adverb
pressure-cook	No	No	Yes	No
cook	Yes	No	Yes	No

As verbs, cook is a hypernym of pressure-cook; that is, cook is a word with a broader meaning than pressure-cook:

pressure-cook (noun)	cook (noun)
	someone who cooks food

pressure-cook (verb)	cook (verb)
cook in a pressure cooker	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