derogation vs mimicker

derogation and mimicker both are nouns.

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

derogation (noun)	mimicker (noun)
(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law	someone who mimics (especially an actor or actress)
a communication that belittles somebody or something