gadfly vs derogation

gadfly and derogation both are nouns.

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

gadfly (noun)	derogation (noun)
any of various large flies that annoy livestock	(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law
a persistently annoying person	a communication that belittles somebody or something