triumph vs walk-in

triumph and walk-in both are nouns.

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

As nouns, walk-in is a hyponym of triumph; that is, walk-in is a word with a more specific, narrower meaning than triumph:

triumph (noun)	walk-in (noun)
a successful ending of a struggle or contest	a small room large enough to admit entrance
the exultation of victory	an assured victory (especially in an election)
	an operative who initiates his own defection (usually to a hostile country) for political asylum
	person who walks in without having an appointment

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