derogation vs oppressor

derogation and oppressor both are nouns.

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

derogation (noun)	oppressor (noun)
(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law	a person of authority who subjects others to undue pressures
a communication that belittles somebody or something