pest vs derogation

pest and derogation both are nouns.

Word	Noun	Adjective	Verb	Adverb
pest	Yes	No	No	No
derogation	Yes	No	No	No

pest (noun)	derogation (noun)
any unwanted and destructive insect or other animal that attacks food or crops or livestock etc.	(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law
a persistently annoying person	a communication that belittles somebody or something
any epidemic disease with a high death rate
a serious (sometimes fatal) infection of rodents caused by Yersinia pestis and accidentally transmitted to humans by the bite of a flea that has bitten an infected animal