(n.) One who appeases; a pacifier.

Charlie McCarthy agent ancilla appeaser appliance arbiter arbitrator broker conciliator connection contact contrivance creature deputy device distributor dummy dupe entrepreneur front front man go-between handmaid handmaiden implement instrument interagent interceder intercessor intermediary intermediate intermediate agent intermediator intermedium internuncio interpleader intervener interventionist interventor jobber judge lever liaison link mechanism mediary medium middleman midwife minion moderator mouthpiece negotiant negotiator negotiatress negotiatrix ombudsman organ pawn peacemaker plaything puppet referee servant slave spokesman spokeswoman stooge tie tool toy troubleshooter umpire vehicle wholesaler