manducate vs crunch

manducate is not a noun while crunch is a noun.

Word	Noun	Adjective	Verb	Adverb
manducate	No	No	Yes	No
crunch	Yes	No	Yes	No

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

Other hyponyms of manducate include champ, chomp, champ, gum, mumble, chaw, munch, gnaw.

manducate (noun)	crunch (noun)
	the act of crushing
	the sound of something crunching
	a critical situation that arises because of a shortage (as a shortage of time or money or resources)

manducate (verb)	crunch (verb)
chew (food); to bite and grind with the teeth	reduce to small pieces or particles by pounding or abrading
	make a crushing noise
	crush with the teeth, making a grinding sound
	press or grind with a crushing noise