sexual activity vs tart

sexual activity and tart both are nouns.

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

sexual activity (noun)	tart (noun)
activities associated with sexual intercourse	a small open pie with a fruit filling
	a pastry cup with a filling of fruit or custard and no top crust
	a woman who engages in sexual intercourse for money

sexual activity (adjective)	tart (adjective)
	tasting sour like a lemon
	harsh