The Collaborative International Dictionary of English v.0.48:

Daze \Daze\ (d[=a]z), v. t. [imp. & p. p. Dazed (d[=a]zd); p.
   pr. & vb. n. Dazing.] [OE. dasen, prob. from Icel. dasask
   to become weary, a reflexive verb; cf. Sw. dasa to lie idle,
   and OD. daesen to be foolish, insane, daes, dwaes, D. dwaas,
   foolish, insane, AS. dw[=ae]s, dysig, stupid. [root]71. Cf.
   Dizzy, Doze.]
   To stupefy with excess of light; with a blow, with cold, or
   with fear; to confuse; to benumb.
   [1913 Webster]

         While flashing beams do daze his feeble eyen.
                                                  --Spenser.
   [1913 Webster]

         Such souls,
         Whose sudden visitations daze the world. --Sir H.
                                                  Taylor.
   [1913 Webster]

         He comes out of the room in a dazed state, that is an
         odd though a sufficient substitute for interest.
                                                  --Dickens.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

dazed \dazed\ adj.
   1. stupefied; conscious but unable to think clearly; --
      usually caused by a blow or other shock.

   Syn: foggy, groggy, logy, stuporous.
        [WordNet 1.5 +PJC]

   2. stunned from or as if from repeated blows.

   Syn: punch-drunk, silly, slaphappy.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

dazed
    adj 1: 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)]
    2: stunned or confused and slow to react (as from blows or
       drunkenness or exhaustion) [syn: dazed, foggy, groggy,
       logy, stuporous]

Moby Thesaurus II by Grady Ward, 1.0:

91 Moby Thesaurus words for "dazed":
   addled, apish, asinine, at a loss, baffled, bamboozled, batty,
   beat, bedazzled, befooled, beguiled, besotted, blindfold,
   blindfolded, brainless, buffaloed, buffoonish, cockeyed,
   confounded, crazy, credulous, daffy, daft, darkened, dazzled,
   dizzy, dopey, doting, dumb, excecate, fatuitous, fatuous, flaky,
   floored, fond, fool, foolheaded, foolish, fuddled, futile, gaga,
   goofy, groggy, gulled, hoodwinked, idiotic, imbecile, in a daze,
   in a dilemma, in suspense, inane, inept, infatuated, insane,
   knocked silly, kooky, licked, loony, mad, maudlin, mazed, moronic,
   muddled, mystified, nonplussed, nutty, obscured, on tenterhooks,
   perplexed, punch-drunk, punchy, puzzled, sappy, screwy, senseless,
   sentimental, silly, slaphappy, snow-blind, snow-blinded, stuck,
   stumped, stunned, stupefied, stupid, thoughtless, thrown, wacky,
   wet, witless, woozy