armipotent authoritative big big-league big-name big-time bigwig bigwigged cogent consequential considerable double-barreled dynamic earthshaking effective energetic forceful forcible grand great heavyweight high-potency high-pressure high-tension important in force in power irresistible major material mighty mighty in battle momentous name operative potent powerful prepotent puissant ruling self-important significant striking strong substantial superior telling valid vigorous vital world-shaking