by-blow vs derogation

by-blow and derogation both are nouns.

Word	Noun	Adjective	Verb	Adverb
by-blow	Yes	No	No	No
derogation	Yes	No	No	No

by-blow (noun)	derogation (noun)
the illegitimate offspring of unmarried parents	(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