crumple vs scrunch

crumple is not a noun while scrunch is a noun.

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

As verbs, scrunch is a hypernym of crumple; that is, scrunch is a word with a broader meaning than crumple:

crumple: to gather something into small wrinkles or folds
scrunch: make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic

Other hypernyms of crumple include crease, crinkle, crisp, ruckle, scrunch up, wrinkle.

crumple (noun)	scrunch (noun)
	a crunching noise

crumple (verb)	scrunch (verb)
become wrinkled or crumpled or creased	make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic
to gather something into small wrinkles or folds	sit on one's heels
fold or collapse	make a noise typical of an engine lacking lubricants
fall apart