derogation vs letch

derogation and letch both are nouns.

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

derogation (noun)	letch (noun)
(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law	man with strong sexual desires
a communication that belittles somebody or something