scum bag vs derogation

scum bag and derogation both are nouns.

Word	Noun	Adjective	Verb	Adverb
scum bag	Yes	No	No	No
derogation	Yes	No	No	No

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