armipotent, at the head, at the helm, at the reins, authoritative, cogent, dynamic, effective, energetic, forceful, forcible, high-potency, high-powered, high-pressure, high-tension, in authority, in charge, in command, in control, in force, in the saddle, irresistible, mighty, mighty in battle, on the throne, operative, potent, powerful, prepotent, puissant, ruling, striking, strong, telling, valid, vigorous, vital