sex vs knocker

sex and knocker both are nouns.

Word	Noun	Adjective	Verb	Adverb
sex	Yes	No	Yes	No
knocker	Yes	No	No	No

sex (noun)	knocker (noun)
activities associated with sexual intercourse	a device (usually metal and ornamental) attached by a hinge to a door
the properties that distinguish organisms on the basis of their reproductive roles	either of two soft fleshy milk-secreting glandular organs on the chest of a woman
all of the feelings resulting from the urge to gratify sexual impulses	one who disparages or belittles the worth of something
either of the two categories (male or female) into which most organisms are divided	a person who knocks (as seeking to gain admittance)
	(Yiddish) a big shot who knows it and acts that way; a boastful immoderate person

sex (verb)	knocker (verb)
tell the sex (of young chickens)
to evoke sexual feelings