ruckle vs scrunch

ruckle is not a noun while scrunch is a noun.

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

As verbs, ruckle and scrunch are synonyms defined as:

ruckle and scrunch: make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic

Other synonyms of ruckle include crease, crinkle, crisp, scrunch up, wrinkle.

ruckle (noun)	scrunch (noun)
	a crunching noise

ruckle (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
make a hoarse, rattling sound	sit on one's heels
	make a noise typical of an engine lacking lubricants