sewer rat vs disparagement

sewer rat and disparagement both are nouns.

Word	Noun	Adjective	Verb	Adverb
sewer rat	Yes	No	No	No
disparagement	Yes	No	No	No

sewer rat (noun)	disparagement (noun)
brown rat commonly found in sewers	the act of speaking contemptuously of
	a communication that belittles somebody or something