bride vs war bride

bride and war bride both are nouns.

Word	Noun	Adjective	Verb	Adverb
bride	Yes	No	No	No
war bride	Yes	No	No	No

As nouns, war bride is a hyponym of bride; that is, war bride is a word with a more specific, narrower meaning than bride:

bride (noun)	war bride (noun)
a woman who has recently been married	bride of a serviceman during wartime
a woman participant in her own marriage ceremony