The Collaborative International Dictionary of English v.0.48:

Reorganization \Re*or`gan*i*za"tion\ (-gan-?-z?"sh?n), n.
   The act of reorganizing; a reorganized existence; as,
   reorganization of the troops.
   [1913 Webster] re-organize

WordNet (r) 3.0 (2006):

reorganization
    n 1: the imposition of a new organization; organizing
         differently (often involving extensive and drastic
         changes); "a committee was appointed to oversee the
         reorganization of the curriculum"; "top officials were
         forced out in the cabinet shakeup" [syn: reorganization,
         reorganisation, shake-up, shakeup]
    2: an extensive alteration of the structure of a corporation or
       government; "after the takeover there was a thorough
       reorganization"; "the reorganization was prescribed by
       federal bankruptcy laws"

Moby Thesaurus II by Grady Ward, 1.0:

40 Moby Thesaurus words for "reorganization":
   copy, duplication, imitation, overturn, palingenesis, re-creation,
   re-formation, realignment, rearrangement, rebirth, rebuilding,
   reconstitution, reconstruction, redesign, redisposition,
   redistribution, redoing, reedition, reestablishment, refashioning,
   regeneration, regenesis, reinstitution, reissue, remaking,
   renascence, renovation, reordering, repetition, reprinting,
   reproduction, reshaping, restoration, restructuring, resurrection,
   revision, revival, revolution, shake-up, turnover