fold up vs scrunch up

fold up and scrunch up both are verbs.

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

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

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

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