walk-in vs derogation

walk-in and derogation both are nouns.

Word	Noun	Adjective	Verb	Adverb
walk-in	Yes	Yes	No	No
derogation	Yes	No	No	No

walk-in (noun)	derogation (noun)
a small room large enough to admit entrance	(law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law
an assured victory (especially in an election)	a communication that belittles somebody or something
an operative who initiates his own defection (usually to a hostile country) for political asylum
person who walks in without having an appointment

walk-in (adjective)	derogation (adjective)
(of e.g. closets or refrigerators) extending very far enough back to allow a person to enter