sexual practice vs nasty

sexual practice is a noun but nasty is not a noun.

Word	Noun	Adjective	Verb	Adverb
sexual practice	Yes	No	No	No
nasty	No	Yes	No	No

sexual practice (noun)	nasty (noun)
activities associated with sexual intercourse

sexual practice (adjective)	nasty (adjective)
	offensive or even (of persons) malicious
	exasperatingly difficult to handle or circumvent
	disgustingly dirty; filled or smeared with offensive matter
	characterized by obscenity