JP
Justice
arbiter
bencher
broker
connection
contact
critic
go-between
governor
his honor
his lordship
his worship
impartial arbitrator
indicator
interagent
intermediary
intermediate
intermedium
internuncio
interpleader
judge
justice
magistrate
mediator
medium
middleman
moderator
negotiant
negotiator
referee
ruler
third party
umpire
unbiased observer
arbitration
evaluator
auditor
commissioner
conciliator
depositary
executor
intercessor
juror
lawgiver
legate
legislator
pacificator
peacemaker
saviour
timekeeper