defamer vs derogation

defamer and derogation both are nouns.

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

defamer (noun)	derogation (noun)
one who attacks the reputation of another by slander or libel	(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law
	a communication that belittles somebody or something