The Collaborative International Dictionary of English v.0.48:

Disenchantment \Dis`en*chant"ment\, n. [Pref. dis- +
   enchantment: cf. F. d['e]senchantement.]
   The act of disenchanting, or state of being disenchanted.
   --Shelton.
   [1913 Webster]

WordNet (r) 3.0 (2006):

disenchantment
    n 1: freeing from false belief or illusions [syn:
         disenchantment, disillusion, disillusionment]

Moby Thesaurus II by Grady Ward, 1.0:

71 Moby Thesaurus words for "disenchantment":
   about-face, awakening, backing, backsliding, ban, blackball,
   blackballing, complaint, debunking, dim view, disagreement,
   disappointment, disapprobation, disapproval, discontent,
   discontentedness, discontentment, disesteem, disfavor,
   disgruntlement, disillusion, disillusionment, displeasure,
   disrespect, dissatisfaction, dissent, distaste, enlightenment,
   exclusion, flip-flop, indignation, lapse, low estimation,
   low opinion, objection, opposition, opposure, ostracism, protest,
   recidivation, recidivism, reclamation, reconversion, regress,
   regression, rehabilitation, reinstatement, rejection, relapse,
   restitution, restoration, retrocession, retrogradation,
   retrogression, retroversion, return, return to reality, returning,
   reversal, reverse, reversion, reverting, revulsion, rude awakening,
   slipping back, thumbs-down, turn, turnabout, undeception,
   unhappiness, unspelling