ruckle vs rattle

ruckle is not a noun while rattle is a noun.

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

As verbs, rattle is a hypernym of ruckle; that is, rattle is a word with a broader meaning than ruckle:

ruckle (noun)	rattle (noun)
	loosely connected horny sections at the end of a rattlesnake's tail
	a baby's toy that makes percussive noises when shaken
	a rapid series of short loud sounds (as might be heard with a stethoscope in some types of respiratory disorders)

ruckle (verb)	rattle (verb)
make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic	shake and cause to make a rattling noise
make a hoarse, rattling sound	make short successive sounds