derogation vs dumb

derogation is a noun but dumb is not a noun.

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

derogation (noun)	dumb (noun)
(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

derogation (adjective)	dumb (adjective)
	slow to learn or understand; lacking intellectual acuity
	unable to speak because of hereditary deafness
	temporarily incapable of speaking
	lacking the power of human speech