derogation vs ambusher

derogation and ambusher both are nouns.

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

derogation (noun)	ambusher (noun)
(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law	an attacker who waits in a concealed position to launch a surprise attack
a communication that belittles somebody or something