The Collaborative International Dictionary of English v.0.48:

Barmaster \Bar"mas`ter\, n. [Berg + master: cf. G. Bergmeister.]
   Formerly, a local judge among miners; now, an officer of the
   barmote. [Eng.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Burghmaster \Burgh"mas`ter\, n.
   1. A burgomaster.
      [1913 Webster]

   2. (Mining) An officer who directs and lays out the meres or
      boundaries for the workmen; -- called also bailiff, and
      barmaster. [Eng.]
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

22 Moby Thesaurus words for "barmaster":
   JA, amicus curiae, assessor, chancellor, circuit judge,
   judge advocate, judge ordinary, jurat, justice in eyre,
   justice of assize, lay judge, legal assessor, master,
   military judge, ombudsman, ordinary, police judge, presiding judge,
   probate judge, puisne judge, recorder, vice-chancellor