inconstant vs sexual practice

inconstant is not a noun while sexual practice is a noun.

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

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

inconstant (adjective)	sexual practice (adjective)
likely to change frequently often without apparent or cogent reason; variable