scrunch up vs cockle

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

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

As verbs, cockle is a hyponym of scrunch up; that is, cockle is a word with a more specific, narrower meaning than scrunch up:

scrunch up: make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic
cockle: to gather something into small wrinkles or folds

Other hyponyms of scrunch up include crumple, knit, pucker, rumple, pucker, ruck, ruck up.

scrunch up (noun)	cockle (noun)
	common edible, burrowing European bivalve mollusk that has a strong, rounded shell with radiating ribs
	common edible European bivalve

scrunch up (verb)	cockle (verb)
make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic	to gather something into small wrinkles or folds
sit on one's heels	stir up (water) so as to form ripples