moderator
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Synonyms:
chairman Collocations, arbitrator, mediator, judge Collocations, JP, justice of the peace, justice Collocations, MC, master of ceremonies, anchorman, arbiter, chair Collocations, conciliator, impartial arbitrator, magistrate, pacificator, peacemaker, president Collocations, presiding officer, referee Collocations, stabilizer, toastmaster, umpire, wiser head, calming influence