A court arbiter is a person who presides over a court of law and makes decisions on legal matters. This term can be used to refer to an UMPIRE (6 letters), REFEREE (7 letters), REF (3 letters), or linejudge (9 letters). An UMPIRE is someone who makes decisions in a sport, while a REFEREE is someone who enforces the rules of a game. A REF is a shortened version of REFEREE, and a linejudge is someone who watches the sidelines of a game to make sure players are not out of bounds.