sex activity vs buss

sex activity and buss both are nouns.

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

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

sex 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.