disparagement vs pesky

disparagement is a noun but pesky is not a noun.

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

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

disparagement (adjective)	pesky (adjective)
	causing irritation or annoyance