undesirable vs derogation

undesirable and derogation both are nouns.

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

undesirable (noun)	derogation (noun)
one whose presence is undesirable	(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

undesirable (adjective)	derogation (adjective)
not wanted
not worthy of being chosen (especially as a spouse)