disparagement vs irritating

disparagement is a noun but irritating is not a noun.

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

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

disparagement (adjective)	irritating (adjective)
	causing irritation or annoyance
	(used of physical stimuli) serving to stimulate or excite
	causing physical discomfort