derogation vs polish off

derogation is a noun but polish off is not a noun.

Word	Noun	Adjective	Verb	Adverb
derogation	Yes	No	No	No
polish off	No	No	Yes	No

derogation (noun)	polish off (noun)
(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law
a communication that belittles somebody or something

derogation (verb)	polish off (verb)
	finish a task completely
	finish eating all the food on one's plate or on the table
	kill intentionally and with premeditation