derogation vs brown rat

derogation and brown rat both are nouns.

Word	Noun	Adjective	Verb	Adverb
derogation	Yes	No	No	No
brown rat	Yes	No	No	No

derogation (noun)	brown rat (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