derogation vs imposter

derogation and imposter both are nouns.

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

derogation (noun)	imposter (noun)
(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law	a person who makes deceitful pretenses
a communication that belittles somebody or something