contractor vs declarer

contractor and declarer both are nouns.

Word	Noun	Adjective	Verb	Adverb
contractor	Yes	No	No	No
declarer	Yes	No	No	No

As nouns, contractor and declarer are synonyms defined as:

contractor and declarer: the bridge player in contract bridge who wins the bidding and can declare which suit is to be trumps

contractor (noun)	declarer (noun)
a bodily organ that contracts	the bridge player in contract bridge who wins the bidding and can declare which suit is to be trumps
someone (a person or firm) who contracts to build things	someone who claims to speak the truth
(law) a party to a contract
the bridge player in contract bridge who wins the bidding and can declare which suit is to be trumps