crinkle vs ruckle

crinkle is a noun but ruckle is not a noun.

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

As verbs, crinkle and ruckle are synonyms defined as:

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

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

crinkle (noun)	ruckle (noun)
a slight depression or fold in the smoothness of a surface

crinkle (verb)	ruckle (verb)
become wrinkled or crumpled or creased	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