gadfly vs disparagement

gadfly and disparagement both are nouns.

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

gadfly (noun)	disparagement (noun)
any of various large flies that annoy livestock	the act of speaking contemptuously of
a persistently annoying person	a communication that belittles somebody or something