nappy vs kinky

nappy is a noun but kinky is not a noun.

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

As adjectives, nappy and kinky are synonyms defined as:

Other synonyms of nappy include crisp, frizzly, frizzy.

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

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