What is another word for "umpire"?

Roget's Thesaurus (1911) lists these synonyms for "umpire": accusation, adjudge, arbiter, arbitrate, arbitration, arbitrator, archon, assessor, assistant, assize, bargain, barmaster, barrister, beak, box, cadi, case, censor, chancellor, come, common, compromise, conservator, consignee, county, court, critic, determine, diplomacy, diplomatics, diplomatist, domesman, ephor, flag, go-between, good, grand, halfway, his, honor.