derogation vs discourtesy

derogation and discourtesy both are nouns.

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

As nouns, discourtesy is a hypernym of derogation; that is, discourtesy is a word with a broader meaning than derogation:

Other hypernyms of derogation include disrespect.

derogation (noun)	discourtesy (noun)
(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law	a lack of politeness; a failure to show regard for others; wounding the feelings of others
a communication that belittles somebody or something	a manner that is rude and insulting
	an expression of lack of respect