Same word as king:
baron, caesar, caliph, crowned head, czar, emperor, gerent, imperator, kaiser, khan, magnate, maharajah, majesty, mikado, mogul, monarch, overlord, pasha, potentate, prince, rajah, rex, shah, sovereign, sultan, tycoon
baron, caesar, caliph, crowned head, czar, emperor, gerent, imperator, kaiser, khan, magnate, maharajah, majesty, mikado, mogul, monarch, overlord, pasha, potentate, prince, rajah, rex, shah, sovereign, sultan, tycoon