pesky vs derogation

pesky is not a noun while derogation is a noun.

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

pesky (noun)	derogation (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

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