Exec and Arbiter

noun

• The chief executive department of the United States government.
  • synonyms: White House

noun

• Someone with the power to settle matters at will.
  • usage: "she was the final arbiter on all matters of fashion"
  • synonyms: supreme authority
• Someone chosen to judge and decide a disputed issue.
  • usage: "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"
  • synonyms: arbitrator, umpire

• (n.) A person appointed or chosen, by parties to determine a controversy between them.
• (n.) Any person who has the power of judging and determining or ordaining, without control; one whose power of deciding and governing is not limited.
• (v.t.) To act as arbiter between.