The Collaborative International Dictionary of English v.0.48:

Discomfiture \Dis*com"fi*ture\ (?; 135), n. [OF. desconfiture,
   F. d['e]confiture. See Discomfort, v. t., and cf.
   Comfiture.]
   The act of discomfiting, or the state of being discomfited;
   rout; overthrow; defeat; frustration; confusion and
   dejection.
   [1913 Webster]

         Every man's sword was against his fellow, and there was
         a very great discomfiture.               --1 Sam. xiv.
                                                  20.
   [1913 Webster]

         A hope destined to end . . . in discomfiture and
         disgrace.                                --Macaulay.
   [1913 Webster]

WordNet (r) 3.0 (2006):

discomfiture
    n 1: anxious embarrassment [syn: discomfiture, discomposure,
         disconcertion, disconcertment]

Moby Thesaurus II by Grady Ward, 1.0:

132 Moby Thesaurus words for "discomfiture":
   abashment, agitation, bafflement, balk, balking, beating,
   befuddlement, betrayed hope, bewilderment, blasted expectation,
   blighted hope, blow, bother, botheration, buffet, chagrin, chaos,
   check, checkmate, cloud, comedown, commotion, confounding,
   confusion, cruel disappointment, dash, dashed hope, daze, debacle,
   defeasance, defeat, derangement, descent, disappointment,
   disarrangement, disarray, disarticulation, discombobulation,
   discomposure, disconcertedness, disconcertion, disconcertment,
   discountenance, disharmony, dishevelment, disillusionment,
   disintegration, disjunction, disorder, disorderliness,
   disorganization, disorientation, disproportion, disquiet,
   disruption, dissatisfaction, distress, disturbance, down, drubbing,
   embarrassment, entropy, failure, fallen countenance, fiasco,
   fizzle, flummox, flurry, fluster, flutter, fog, foil, foiling,
   forlorn hope, frenzy, frustration, fuddle, fuddlement,
   haphazardness, haze, hope deferred, incoherence,
   indiscriminateness, inharmonious harmony, irregularity, jumble,
   letdown, licking, maze, mess, mirage, mist, mortification,
   most admired disorder, muddle, muddlement, nonsymmetry,
   nonuniformity, overthrow, perplexity, perturbation, pother,
   prickles, promiscuity, promiscuousness, pucker, randomness, rebuff,
   repulse, reversal, reverse, rout, ruffle, setback, shellacking,
   shuffle, sore disappointment, stew, sweat, swivet, tantalization,
   tease, thwarting, tizzy, turbulence, unease, uneasiness,
   unsettlement, unsymmetry, ununiformity, upset, vanquishment