walk-in vs triumph

walk-in and triumph both are nouns.

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

As nouns, triumph is a hypernym of walk-in; that is, triumph is a word with a broader meaning than walk-in:

Other hypernyms of walk-in include victory.

walk-in (noun)	triumph (noun)
a small room large enough to admit entrance	a successful ending of a struggle or contest
an assured victory (especially in an election)	the exultation of victory
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)	triumph (adjective)
(of e.g. closets or refrigerators) extending very far enough back to allow a person to enter