sexual activity vs buss

sexual activity and buss both are nouns.

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

sexual activity (noun)	buss (noun)
activities associated with sexual intercourse	the act of caressing with the lips (or an instance thereof)

sexual activity (verb)	buss (verb)
	touch with the lips or press the lips (against someone's mouth or other body part) as an expression of love, greeting, etc.