derogation vs Rattus norvegicus

derogation and Rattus norvegicus both are nouns.

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

derogation (noun)	Rattus norvegicus (noun)
(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law	common domestic rat; serious pest worldwide
a communication that belittles somebody or something