mediator (n.)

• agent
• appeaser
• appliance
• arbiter
• arbitrator
• broker
• conciliator
• connection
• contact
• contrivance
• creature
• deputy
• device
• distributor
• dummy
• dupe
• entrepreneur
• front
• go-between
• handmaid
• handmaiden
• implement
• instrument
• intercessor
• intermediary
• intermediate
• intermediator
• intermedium
• internuncio
• 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