sexual practice vs immoral

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

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

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

sexual practice (adjective)	immoral (adjective)
	deliberately violating accepted principles of right and wrong
	not adhering to ethical or moral principles