mass murderer vs derogation

mass murderer and derogation both are nouns.

Word	Noun	Adjective	Verb	Adverb
mass murderer	Yes	No	No	No
derogation	Yes	No	No	No

mass murderer (noun)	derogation (noun)
a person who is responsible for the deaths of many victims in a single incident	(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