scrunch up vs crinkle

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

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

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

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

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

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

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