scrunch up vs rumple

scrunch up and rumple both are verbs.

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

As verbs, rumple is a hyponym of scrunch up; that is, rumple 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
rumple: to gather something into small wrinkles or folds

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

scrunch up (verb)	rumple (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	disturb the smoothness of
	to gather something into small wrinkles or folds