Irish bull vs derogation

Irish bull and derogation both are nouns.

Word	Noun	Adjective	Verb	Adverb
Irish bull	Yes	No	No	No
derogation	Yes	No	No	No

Irish bull (noun)	derogation (noun)
Obscene word for unacceptable 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