maniacal

from WordNet (r) 3.0 (2006)

maniacal
    adj 1: wildly disordered; "a maniacal frenzy" [syn: {maniacal},
           {maniac(p)}]

from The Collaborative International Dictionary of English v.0.48

Maniacal \Ma*ni"a*cal\, a.
   Affected with, or characterized by, madness; maniac. --
   {Ma*ni"a*cal*ly}, adv.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

66 Moby Thesaurus words for "maniacal":
      Dionysiac, abandoned, amok, bacchic, bellowing, berserk,
      carried away, corybantic, crazy, delirious, demented, demoniac,
      deranged, desperate, distracted, ecstatic, enraptured, feral,
      ferocious, fierce, frantic, frenetic, frenzied, fulminating,
      furious, haggard, hog-wild, howling, hysterical, in a transport,
      in hysterics, insane, intoxicated, like one possessed, loony,
      lunatic, mad, madding, maenadic, maniac, manic, mentally ill,
      non compos mentis, of unsound mind, orgasmic, orgiastic, possessed,
      psychotic, rabid, raging, ramping, ranting, raving, raving mad,
      ravished, roaring, running mad, running wild, stark-raving mad,
      storming, transported, uncontrollable, violent, wild, wild-eyed,
      wild-looking