Synonyms for Moderator:
n.abbess, bishop, archdeacon, the Archbishop of Canterbury, canon, archbishop, abbot, cardinal, bishopric, archbishopric. contingent, convener, deputation, chair, delegate, discussion group, chairwoman, meeting. •arbiter (noun)
expert, censor, mediator, judge, authority, justice, adjudicator, lord chancellor, his honor, reconciler, arbitrator, negotiator, his lordship, magistrate, administrator, referee, judiciary, umpire.