derogation vs dirty dog

derogation and dirty dog both are nouns.

Word	Noun	Adjective	Verb	Adverb
derogation	Yes	No	No	No
dirty dog	Yes	No	No	No

derogation (noun)	dirty dog (noun)
(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law	a person who is deemed to be despicable or contemptible
a communication that belittles somebody or something