declarer vs bridge player

declarer and bridge player both are nouns.

Word	Noun	Adjective	Verb	Adverb
declarer	Yes	No	No	No
bridge player	Yes	No	No	No

As nouns, bridge player is a hypernym of declarer; that is, bridge player is a word with a broader meaning than declarer:

declarer: the bridge player in contract bridge who wins the bidding and can declare which suit is to be trumps
bridge player: a card player in a game of bridge

Other hypernyms of declarer include hand.

declarer (noun)	bridge player (noun)
the bridge player in contract bridge who wins the bidding and can declare which suit is to be trumps	a card player in a game of bridge
someone who claims to speak the truth