kinky vs nappy

kinky is not a noun while nappy is a noun.

Word	Noun	Adjective	Verb	Adverb
kinky	No	Yes	No	No
nappy	Yes	Yes	No	No

As adjectives, kinky and nappy are synonyms defined as:

Other synonyms of kinky include crisp, frizzly, frizzy.

kinky (noun)	nappy (noun)
	garment consisting of a folded cloth drawn up between the legs and fastened at the waist; worn by infants to catch excrement

kinky (adjective)	nappy (adjective)
(used of sexual behavior) showing or appealing to bizarre or deviant tastes	(of hair) in small tight curls
(of hair) in small tight curls
(informal) strikingly unconventional