scrunch up vs hunker down

scrunch up and hunker down both are verbs.

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

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

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

scrunch up (verb)	hunker down (verb)
make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic	hold stubbornly to a position
sit on one's heels	sit on one's heels
	take shelter