grumbler vs disparagement

grumbler and disparagement both are nouns.

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

grumbler (noun)	disparagement (noun)
a person given to excessive complaints and crying and whining	the act of speaking contemptuously of
	a communication that belittles somebody or something