slanderer vs disparagement

slanderer and disparagement both are nouns.

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

slanderer (noun)	disparagement (noun)
one who attacks the reputation of another by slander or libel	the act of speaking contemptuously of
	a communication that belittles somebody or something