scrunch up vs scrunch

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

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

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

scrunch up and scrunch: 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, crinkle, crisp, ruckle, wrinkle.

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

Other synonyms of scrunch up include crouch, hunker, hunker down, squat.

scrunch up (noun)	scrunch (noun)
	a crunching noise

scrunch up (verb)	scrunch (verb)
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	sit on one's heels
	make a noise typical of an engine lacking lubricants