(sports) the chief official (as in boxing or American football) who is expected to ensure fair play
  1. referee
A person, usually appointed, who decides the issues or results, or supervises the conduct, of a competition or conflict

Words Related to Ref

Related words are words that are directly connected to each other through their meaning, even if they are not synonyms or antonyms. This connection may be general or specific, or the words may appear frequently together.