crinkle vs rumple

crinkle is a noun but rumple is not a noun.

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

As verbs, crinkle and rumple are synonyms defined as:

Other synonyms of crinkle include crease, crumple, wrinkle.

As verbs, rumple is a hyponym of crinkle; that is, rumple is a word with a more specific, narrower meaning than crinkle:

crinkle: 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 crinkle include cockle, crumple, knit, pucker, pucker, ruck, ruck up.

crinkle (noun)	rumple (noun)
a slight depression or fold in the smoothness of a surface

crinkle (verb)	rumple (verb)
become wrinkled or crumpled or creased	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
	to gather something into small wrinkles or folds