rumple vs scrunch

rumple is not a noun while scrunch is a noun.

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

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

rumple: 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 rumple include crease, crinkle, crisp, ruckle, scrunch up, wrinkle.

rumple (noun)	scrunch (noun)
	a crunching noise

rumple (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
disturb the smoothness of	sit on one's heels
to gather something into small wrinkles or folds	make a noise typical of an engine lacking lubricants