scrunch up vs fold up

scrunch up and fold up both are verbs.

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

As verbs, fold up is a hypernym of scrunch up; that is, fold up is a word with a broader 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
fold up: bend or lay so that one part covers the other

Other hypernyms of scrunch up include fold, turn up.

scrunch up (verb)	fold up (verb)
make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic	become folded or folded up
sit on one's heels	bend or lay so that one part covers the other