cook vs blanch

cook is a noun but blanch is not a noun.

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

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

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

cook (verb)	blanch (verb)
transform and make suitable for consumption by heating	turn pale, as if in fear
transform by heating	cook (vegetables) briefly
prepare for eating by applying heat
prepare a hot meal
tamper, with the purpose of deception