kiss vs sexual activity

kiss and sexual activity both are nouns.

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

kiss (noun)	sexual activity (noun)
the act of caressing with the lips (or an instance thereof)	activities associated with sexual intercourse
a light glancing touch
any of several bite-sized candies
a cookie made of egg whites and sugar

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