crinkle vs scrunch up

crinkle is a noun but scrunch up is not a noun.

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

As verbs, crinkle and scrunch up are synonyms defined as:

crinkle and scrunch up: make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic

Other synonyms of crinkle include crease, crisp, ruckle, scrunch, wrinkle.

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

crinkle (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
make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic	sit on one's heels