knocker vs derogation

knocker and derogation both are nouns.

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

knocker (noun)	derogation (noun)
a device (usually metal and ornamental) attached by a hinge to a door	(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law
either of two soft fleshy milk-secreting glandular organs on the chest of a woman	a communication that belittles somebody or something
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