From WordNet (r) 2.1 (2005) (link)

  stupefied
      adj 1: as if struck dumb with astonishment and surprise; "a
             circle of policement stood dumbfounded by her denial of
             having seen the accident"; "the flabbergasted aldermen
             were speechless"; "was thunderstruck by the news of his
             promotion" [syn: dumbfounded, dumfounded,
             flabbergasted, stupefied, thunderstruck,
             dumbstruck, dumbstricken]
      2: in a state of mental numbness especially as resulting from
         shock; "he had a dazed expression on his face"; "lay
         semiconscious, stunned (or stupefied) by the blow"; "was
         stupid from fatigue" [syn: dazed, stunned, stupefied,
         stupid(p)]

From Webster's Revised Unabridged Dictionary (1913) (link)

  Stupefied \Stu"pe*fied\, a.
     Having been made stupid.

From Webster's Revised Unabridged Dictionary (1913) (link)

  Stupefy \Stu"pe*fy\, v. t. [imp. & p. p. Stupefied; p. pr. &
     vb. n. Stupefying.] [F. stup['e]fier, fr. L. stupere to be
     stupefied + ficare (in comp.) to make, akin to facere. See
     Stupid, Fact, and cf. Stupefacient.] [Written also
     stupify, especially in England.]
     1. To make stupid; to make dull; to blunt the faculty of
        perception or understanding in; to deprive of sensibility;
        to make torpid.

From Moby Thesaurus II by Grady Ward, 1.0 (link)

  121 Moby Thesaurus words for "stupefied":
     Laodicean, Olympian, agape, aghast, agog, all agog, aloof, amazed,
     apathetic, appalled, ashen, astonished, astounded, at gaze, awed,
     awestricken, awestruck, beguiled, benumbed, bewildered, bewitched,
     blah, blanched, blase, breathless, captivated, comatose,
     confounded, cowed, dazed, deadly pale, desensitized, detached,
     disinterested, dull, dumbfounded, dumbstruck, enchanted,
     enraptured, enravished, enthralled, entranced, fascinated,
     flabbergasted, frozen, gaping, gauping, gazing, gray with fear,
     heartless, hebetudinous, hopeless, horrified, horror-struck,
     hypnotized, in a stupor, in awe, in awe of, indifferent,
     insouciant, intimidated, languid, lethargic, listless,
     lost in wonder, marveling, mesmerized, nonchalant, numb, numbed,
     open-eyed, openmouthed, overwhelmed, pale as death, pallid,
     paralyzed, passive, petrified, phlegmatic, pluckless, popeyed,
     puzzled, rapt in wonder, resigned, scared stiff, scared to death,
     slack, sluggish, soporific, spellbound, spiritless, spunkless,
     staggered, staring, stoic, stunned, supine, surprised, terrified,
     terror-crazed, terror-haunted, terror-ridden, terror-riven,
     terror-shaken, terror-smitten, terror-struck, terror-troubled,
     thunderstruck, torpid, uncaring, unconcerned, under a charm,
     undone, uninterested, unmanned, unnerved, unstrung, wide-eyed,
     withdrawn, wonder-struck, wondering