niggler vs disparagement

niggler and disparagement both are nouns.

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

niggler (noun)	disparagement (noun)
someone who constantly criticizes in a petty way	the act of speaking contemptuously of
	a communication that belittles somebody or something