The Collaborative International Dictionary of English v.0.48:

Disorganization \Dis*or`gan*i*za"tion\, n. [Cf. F.
   d['e]sorganisation. See Disorganize, v. t.]
   1. The act of disorganizing; destruction of system.
      [1913 Webster]

   2. The state of being disorganized; as, the disorganization
      of the body, or of government.
      [1913 Webster]

            The magazine of a pawnbroker in such total
            disorganization, that the owner can never lay his
            hands upon any one article at the moment he has
            occasion for it.                      --Sir W.
                                                  Scott.
      [1913 Webster]

WordNet (r) 3.0 (2006):

disorganization
    n 1: a condition in which an orderly system has been disrupted
         [syn: disorganization, disorganisation,
         disarrangement]
    2: the disturbance of a systematic arrangement causing disorder
       and confusion; "the disorganization of the enemy troops by a
       flank attack" [syn: disorganization, disorganisation]

Moby Thesaurus II by Grady Ward, 1.0:

159 Moby Thesaurus words for "disorganization":
   ablation, anarchism, anarcho-syndicalism, anarchy, antinomianism,
   atomization, befuddlement, bewilderment, biodegradability,
   biodegradation, bloodbath, blue ruin, bother, botheration, breakup,
   carnage, chaos, cloud, confusion, consumption, convulsion,
   corrosion, corruption, criminal syndicalism, crumbling, damnation,
   daze, deactivation, decay, decimation, decomposition,
   degradability, degradation, demobilization, depredation,
   derangement, desolation, despoilment, despoliation, destruction,
   detachment, devastation, diaspora, dilapidation, disarrangement,
   disarray, disarticulation, disbandment, discombobulation,
   discomfiture, discomposure, disconcertedness, disconcertion,
   disharmony, dishevelment, disintegration, disjunction, dislocation,
   dismissal, disorder, disorderliness, disorientation, dispersal,
   dispersion, disproportion, disruption, dissolution, disturbance,
   embarrassment, entropy, erosion, flummox, flurry, fluster, flutter,
   fog, frenzy, fuddle, fuddlement, haphazardness, havoc, haze,
   hecatomb, holocaust, incoherence, indiscriminateness,
   inharmonious harmony, insanity, irregularity, jumble, lynch law,
   maze, mess, mildew, misarrangement, misrule, mist, mob law,
   mob rule, mobocracy, mold, most admired disorder, muddle,
   muddlement, nihilism, nonsymmetry, nonuniformity, ochlocracy,
   oxidation, oxidization, parting, perdition, perplexity,
   perturbation, pother, primal chaos, promiscuity, promiscuousness,
   pucker, randomness, ravage, ravages of time, rebellion, release,
   resolution, revolution, ruffle, ruin, ruination, rust, separation,
   shambles, shuffle, shuffling, slaughter, split-up, spoilage,
   spoliation, stew, sweat, swivet, syndicalism, tizzy, tohubohu,
   turbulence, turmoil, undoing, unruliness, unsettlement, unsymmetry,
   ununiformity, upset, vandalism, waste, wear, wear and tear, wrack,
   wrack and ruin, wreck