disparagement vs brainless

disparagement is a noun but brainless is not a noun.

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

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

disparagement (adjective)	brainless (adjective)
	not using intelligence