scrunch vs crump

scrunch is a noun but crump is not a noun.

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

As verbs, scrunch and crump are synonyms defined as:

Other synonyms of scrunch include thud.

scrunch (noun)	crump (noun)
a crunching noise

scrunch (verb)	crump (verb)
make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic	explode heavily or with a loud dull noise
sit on one's heels	bombard with heavy shells
make a noise typical of an engine lacking lubricants	make a noise typical of an engine lacking lubricants