derogation vs louse

derogation and louse both are nouns.

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

derogation (noun)	louse (noun)
(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law	wingless usually flattened bloodsucking insect parasitic on warm-blooded animals
a communication that belittles somebody or something	any of several small insects especially aphids that feed by sucking the juices from plants
	wingless insect with mouth parts adapted for biting; mostly parasitic on birds
	a person who has a nasty or unethical character undeserving of respect