ruckle vs ruck up

ruckle and ruck up both are verbs.

Word	Noun	Adjective	Verb	Adverb
ruckle	No	No	Yes	No
ruck up	No	No	Yes	No

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

ruckle: make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic
ruck up: become wrinkled or drawn together

Other hyponyms of ruckle include cockle, crumple, knit, pucker, rumple, pucker, ruck.

ruckle (verb)	ruck up (verb)
make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic	become wrinkled or drawn together
make a hoarse, rattling sound