ombudsman (n.)
- agent
- assessor
- chancellor
- connection
- deputy
- front
- go-between
- intercessor
- intermediary
- intermediate
- intermediator
- intermedium
- internuncio
- master
- mediator
- medium
- middleman
- mouthpiece
- negotiant
- negotiator
- negotiatress
- negotiatrix
- ordinary
- recorder
- spokesman
- spokeswoman
