Rattus norvegicus vs disparagement

Rattus norvegicus and disparagement both are nouns.

Word	Noun	Adjective	Verb	Adverb
Rattus norvegicus	Yes	No	No	No
disparagement	Yes	No	No	No

Rattus norvegicus (noun)	disparagement (noun)
common domestic rat; serious pest worldwide	the act of speaking contemptuously of
	a communication that belittles somebody or something