derogation vs plaguy

derogation is a noun but plaguy is not a noun.

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

derogation (noun)	plaguy (noun)
(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

derogation (adjective)	plaguy (adjective)
	causing irritation or annoyance

derogation (adverb)	plaguy (adverb)
	in a pernicious or annoying manner