derogation vs instigant

derogation and instigant both are nouns.

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

derogation (noun)	instigant (noun)
(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law	someone who deliberately foments trouble
a communication that belittles somebody or something