scrunch up vs crumple

scrunch up and crumple both are verbs.

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

As verbs, crumple is a hyponym of scrunch up; that is, crumple is a word with a more specific, narrower meaning than scrunch up:

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

Other hyponyms of scrunch up include cockle, knit, pucker, rumple, pucker, ruck, ruck up.

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