sexual activity vs lust

sexual activity and lust both are nouns.

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

sexual activity (noun)	lust (noun)
activities associated with sexual intercourse	self-indulgent sexual desire (personified as one of the deadly sins)
	a strong sexual desire

sexual activity (verb)	lust (verb)
	have a craving, appetite, or great desire for