The Collaborative International Dictionary of English v.0.48:

Bewilder \Be*wil"der\, v. t. [imp. & p. p. Bewildered; p. pr.
   & vb. n. Bewildering.] [Pref. be- + wilder.]
   To lead into perplexity or confusion, as for lack of a plain
   path; to perplex with mazes; or in general, to perplex or
   confuse greatly.
   [1913 Webster]

         Lost and bewildered in the fruitless search. --Addison.
   [1913 Webster]

   Syn: To perplex; puzzle; entangle; confuse; confound;
        mystify; embarrass; lead astray.
        [1913 Webster]

WordNet (r) 3.0 (2006):

bewilder
    v 1: be a mystery or bewildering to; "This beats me!"; "Got me--
         I don't know the answer!"; "a vexing problem"; "This
         question really stuck me" [syn: perplex, vex, stick,
         get, puzzle, mystify, baffle, beat, pose,
         bewilder, flummox, stupefy, nonplus, gravel,
         amaze, dumbfound]
    2: cause to be confused emotionally [syn: bewilder, bemuse,
       discombobulate, throw]

Moby Thesaurus II by Grady Ward, 1.0:

78 Moby Thesaurus words for "bewilder":
   abash, addle, addle the wits, amaze, astonish, astound, awe,
   awestrike, baffle, ball up, becloud, bedaze, bedazzle, befog,
   befuddle, bemuse, boggle, bother, bowl down, bowl over, bug, cap,
   cloud, confound, confuse, daze, dazzle, discombobulate, discomfit,
   discompose, disconcert, dismay, disorganize, disorient, distract,
   disturb, dumbfound, dumbfounder, embarrass, entangle, flabbergast,
   flummox, flurry, fluster, flutter, fog, fuddle, fuss, maze, mist,
   mix up, moider, muddle, mystify, overwhelm, paralyze, perplex,
   perturb, petrify, pose, pother, put out, puzzle, raise hell,
   rattle, ruffle, stagger, startle, strike dead, strike dumb,
   strike with wonder, stumble, stun, stupefy, surprise,
   throw into confusion, unsettle, upset