disparagement vs pestiferous

disparagement is a noun but pestiferous is not a noun.

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

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

disparagement (adjective)	pestiferous (adjective)
	causing irritation or annoyance
	likely to spread and cause an epidemic disease
	tending to corrupt or pervert
	contaminated with infecting organisms