dumb vs disparagement

dumb is not a noun while disparagement is a noun.

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

dumb (noun)	disparagement (noun)
	the act of speaking contemptuously of
	a communication that belittles somebody or something

dumb (adjective)	disparagement (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