first offender vs derogation

first offender and derogation both are nouns.

Word	Noun	Adjective	Verb	Adverb
first offender	Yes	No	No	No
derogation	Yes	No	No	No

first offender (noun)	derogation (noun)
someone convicted for the first time	(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