trophy wife vs wife

trophy wife and wife both are nouns.

Word	Noun	Adjective	Verb	Adverb
trophy wife	Yes	No	No	No
wife	Yes	No	No	No

As nouns, wife is a hypernym of trophy wife; that is, wife is a word with a broader meaning than trophy wife:

trophy wife: a wife who is an attractive young woman; seldom the first wife of an affluent older man
wife: a married woman; a man's partner in marriage

Other hypernyms of trophy wife include married woman.

trophy wife (noun)	wife (noun)
a wife who is an attractive young woman; seldom the first wife of an affluent older man	a married woman; a man's partner in marriage