derogation vs poser

derogation and poser both are nouns.

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

derogation (noun)	poser (noun)
(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law	a particularly difficult or baffling question or problem
a communication that belittles somebody or something	a person who poses for a photographer or painter or sculptor
	a person who habitually pretends to be something he is not