derogation vs sad sack

derogation and sad sack both are nouns.

Word	Noun	Adjective	Verb	Adverb
derogation	Yes	No	No	No
sad sack	Yes	No	No	No

derogation (noun)	sad sack (noun)
(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law	someone who makes mistakes because of incompetence
a communication that belittles somebody or something