Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun arbiter

2 senses of arbiter

Sense 1
arbiter, supreme authority -- (someone with the power to settle matters at will; "she was the final arbiter on all matters of fashion")
       => expert -- (a person with special knowledge or ability who performs skillfully)

Sense 2
arbiter, arbitrator, umpire -- (someone chosen to judge and decide a disputed issue; "the critic was considered to be an arbiter of modern literature"; "the arbitrator's authority derived from the consent of the disputants"; "an umpire was appointed to settle the tax case")
       => evaluator, judge -- (an authority who is able to estimate worth or quality)