WordNet (r) 3.0 (2006):

disorientation
    n 1: a wild delusion (especially one induced by a hallucinogenic
         drug) [syn: disorientation, freak out]
    2: confusion (usually transient) about where you are and how to
       proceed; uncertainty as to direction; "his disorientation was
       the result of inattention"

Moby Thesaurus II by Grady Ward, 1.0:

114 Moby Thesaurus words for "disorientation":
   aberration, abnormality, accommodation, adaptation, adjustment,
   agnosia, alienation, alignment, bearings, befuddlement,
   bewilderment, block, blocking, bother, botheration, brain damage,
   brainsickness, chaos, cloud, clouded mind, confusion, craziness,
   daftness, daze, delirium, delusion, delusion of persecution,
   dementedness, dementia, derangement, discombobulation,
   discomfiture, discomposure, disconcertion, disorder,
   disorganization, distraction, disturbance, embarrassment,
   flight of ideas, flummox, flurry, fluster, flutter, fog, folie,
   frenzy, fuddle, fuddlement, furor, hallucination, hallucinosis,
   haze, insaneness, insanity, irrationality, jumble, loss of mind,
   loss of reason, lunacy, madness, mania, maze, mental block,
   mental confusion, mental deficiency, mental derangement,
   mental disease, mental disorder, mental disturbance,
   mental illness, mental instability, mental sickness, mess,
   mind overthrown, mindsickness, mist, muddle, muddlement, nihilism,
   nihilistic delusion, oddness, orientation, paralogia, perplexity,
   perturbation, pixilation, possession, pother, psychological block,
   pucker, queerness, rabidness, reasonlessness, ruffle,
   senselessness, shattered mind, shuffle, sick mind, sickness, stew,
   strangeness, sweat, swivet, tizzy, unbalance, unbalanced mind,
   unsaneness, unsettlement, unsound mind, unsoundness,
   unsoundness of mind, upset, witlessness