arbiter

ruling; regnant, at the head, dominant, paramount, supreme, predominant, preponderant, in the ascendant, influential; gubernatorial; imperious; authoritative, executive, administrative, clothed with authority, official, departmental, ex officio, imperative, peremptory, overruling, absolute; hegemonic, hegemonical; arbitrary; compulsory: stringent., regal, sovereign; royal, royalist; monarchical, kingly; imperial, imperiatorial; princely; feudal; aristocratic, autocratic; oligarchic; republican, dynastic., at one's command; in one's power, in one's grasp; under control; authorized (due).