crumple vs scrunch up

crumple and scrunch up both are verbs.

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

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

crumple: to gather something into small wrinkles or folds
scrunch up: 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, wrinkle.

crumple (verb)	scrunch up (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
fall apart