derogation vs bottom feeder

derogation and bottom feeder both are nouns.

Word	Noun	Adjective	Verb	Adverb
derogation	Yes	No	No	No
bottom feeder	Yes	No	No	No

derogation (noun)	bottom feeder (noun)
(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law	an opportunist who profits from the misfortunes of others
a communication that belittles somebody or something