"declarer" in the noun sense
1. contractor, declarer
the bridge player in contract bridge who wins the bidding and can declare which suit is to be trumps
2. asserter, declarer, affirmer, asseverator, avower
someone who claims to speak the truth
"a bold asserter"
"a declarer of his intentions"
"affirmers of traditional doctrine"
"an asseverator of strong convictions"
"an avower of his own great intelligence"
Source: WordNet® (An amazing lexical database of English)
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