flabbergast

from WordNet (r) 3.0 (2006)

flabbergast
    v 1: overcome with amazement; "This boggles the mind!" [syn:
         {flabbergast}, {boggle}, {bowl over}]

from The Collaborative International Dictionary of English v.0.48

Flabbergast \Flab"ber*gast\ (fl[a^]b"b[~e]r*g[a^]st), v. t. [Cf.
   {Flap}, and {Aghast}.]
   To astonish; to strike with wonder, esp. by extraordinary
   statements. [Jocular] --Beaconsfield.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

29 Moby Thesaurus words for "flabbergast":
      amaze, astonish, astound, awe, awestrike, bedaze, bedazzle,
      bewilder, boggle, bowl down, bowl over, confound, daze, dazzle,
      dumbfound, dumbfounder, overwhelm, paralyze, perplex, petrify,
      shock, stagger, startle, strike dead, strike dumb,
      strike with wonder, stun, stupefy, surprise

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