armipotent, authoritative, big-league, big-name, big-time, big, 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