derogation vs killjoy

derogation and killjoy both are nouns.

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

derogation (noun)	killjoy (noun)
(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law	someone who spoils the pleasure of others
a communication that belittles somebody or something