backslider vs derogation

backslider and derogation both are nouns.

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

backslider (noun)	derogation (noun)
someone who lapses into previous undesirable patterns of behavior	(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