immoral vs sexual activity

immoral is not a noun while sexual activity is a noun.

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

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

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