prepotent

Prepotent \Pre*po"tent\, a. [L. praepotens. See {Pre-}, and
   {Potent}.]
   [1913 Webster]
   1. Very powerful; superior in force, influence, or authority;
      predominant. --Plaifere.
      [1913 Webster]

   2. (Biol.) Characterized by prepotency. --Darwin.
      [1913 Webster]
    

63 Moby Thesaurus words for "prepotent":
      armipotent, ascendant, at the head, authoritative, boss, chief,
      cogent, commanding, controlling, dominant, dynamic, effective,
      energetic, forceful, forcible, general, governing, head, hegemonic,
      hegemonistic, high-potency, high-powered, high-pressure,
      high-tension, in ascendancy, in charge, in chief, in force,
      in power, in the ascendant, irresistible, leading, master, mighty,
      mighty in battle, on the throne, operative, paramount, potent,
      powerful, predominant, predominate, prepollent, preponderant,
      preponderate, prevailing, prevalent, puissant, regnant, regulating,
      regulative, regulatory, reigning, ruling, sovereign, striking,
      strong, supreme, swaying, telling, valid, vigorous, vital