derogation vs nitpicker

derogation and nitpicker both are nouns.

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

derogation (noun)	nitpicker (noun)
(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law	someone who makes small and unjustified criticisms
a communication that belittles somebody or something