fanatical

fanatical
    adj 1: marked by excessive enthusiasm for and intense devotion
           to a cause or idea; "rabid isolationist" [syn: {fanatic},
           {fanatical}, {overzealous}, {rabid}]
    

Fanatical \Fa*nat"ic*al\, a.
   Characteristic of, or relating to, fanaticism; fanatic.
   -{Fa*nat"ic*al*ly}, adv. -- {Fa*nat"ic*al*ness}, n.
   [1913 Webster]
    

132 Moby Thesaurus words for "fanatical":
      agog, ardent, at fever pitch, authoritarian, balking, balky, bigot,
      bigoted, borne, bulldogged, bulletheaded, bullheaded, burning,
      case-hardened, closed, compulsive, constricted, cramped,
      creedbound, deaf, deaf to reason, delirious, distracted, dogged,
      dogmatic, enthusiastic, excessive, extravagant, extreme, extremist,
      fanatic, febrile, fervent, fervid, feverish, fiery, flaming,
      frantic, frenetic, frenzied, furious, haggard, hard-core,
      hardheaded, headstrong, heated, hectic, hidebound, hot, hotheaded,
      hysteric, illiberal, immoderate, infatuated, inflamed, inordinate,
      insane, insular, intolerant, irrational, little, little-minded,
      mad, madcap, maniacal, mean, mean-minded, mean-spirited,
      monomaniacal, mulish, narrow, narrow-hearted, narrow-minded,
      narrow-souled, narrow-spirited, nearsighted, obsessive, obstinate,
      opinionated, overanxious, overdesirous, overdevout, overeager,
      overenthusiastic, overreligious, overrighteous, overzealous,
      parochial, passionate, perfervid, persevering, pertinacious, petty,
      pigheaded, provincial, purblind, rabid, red-hot, restive,
      sanctimonious, scorching, self-willed, set, shortsighted, small,
      small-minded, stiff-necked, straitlaced, strong-willed,
      strongheaded, stubborn, stuffy, sulky, sullen, tenacious,
      totally committed, ultrareligious, ultrazealous, uncatholic,
      uncharitable, uncooperative, ungenerous, unliberal, unreasonable,
      unregenerate, white-hot, wild, wild-eyed, wild-looking, willful,
      zealotic, zealous