knocker vs sexual activity

knocker and sexual activity both are nouns.

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

knocker (noun)	sexual activity (noun)
a device (usually metal and ornamental) attached by a hinge to a door	activities associated with sexual intercourse
either of two soft fleshy milk-secreting glandular organs on the chest of a woman
one who disparages or belittles the worth of something
a person who knocks (as seeking to gain admittance)
(Yiddish) a big shot who knows it and acts that way; a boastful immoderate person