ROGET THESAURUS
propitiator
Mediation
N
mediation, mediatorship, mediatization, intervention, interposition, interference, intermeddling, intercession, arbitration, flag of truce, good offices, peace offering, parley, negotiation, diplomatics, diplomacy, compromise, mediator, arbitrator, intercessor, peacemaker, makepeace, negotiator, go-between, diplomatist, moderator,
propitiator, umpire, mediatory.