crunch vs crump

crunch is a noun but crump is not a noun.

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

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

Other hyponyms of crunch include scrunch, thud.

crunch (noun)	crump (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)

crunch (verb)	crump (verb)
reduce to small pieces or particles by pounding or abrading	explode heavily or with a loud dull noise
make a crushing noise	bombard with heavy shells
crush with the teeth, making a grinding sound	make a noise typical of an engine lacking lubricants
press or grind with a crushing noise