sexual activity vs boob

sexual activity and boob both are nouns.

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

sexual activity (noun)	boob (noun)
activities associated with sexual intercourse	either of two soft fleshy milk-secreting glandular organs on the chest of a woman
	an ignorant or foolish person

sexual activity (verb)	boob (verb)
	commit a faux pas or a fault or make a serious mistake