WordNet (r) 3.0 (2006):

wake up
    v 1: cause to become awake or conscious; "He was roused by the
         drunken men in the street"; "Please wake me at 6 AM." [syn:
         awaken, wake, waken, rouse, wake up, arouse]
         [ant: cause to sleep]
    2: stop sleeping; "She woke up to the sound of the alarm clock"
       [syn: wake up, awake, arouse, awaken, wake, come
       alive, waken] [ant: dope off, doze off, drift off,
       drop off, drowse off, fall asleep, flake out, nod
       off]

Moby Thesaurus II by Grady Ward, 1.0:

83 Moby Thesaurus words for "wake up":
   annoy, arouse, awake, awaken, blow the coals, blow up,
   break the spell, burst the bubble, call forth, call up, come alive,
   correct, debunk, disabuse, disappoint, disenchant, disillude,
   disillusion, disillusionize, enkindle, enlighten, enrage, excite,
   expose, fan, fan the fire, fan the flame, feed the fire, fire,
   flame, foment, frenzy, get up, heat, impassion, incense, incite,
   inflame, infuriate, key up, kindle, knock up, lather up,
   let down easy, let in on, light the fuse, light up, madden, move,
   overexcite, pique, prick the bubble, put straight, raise, raise up,
   rouse, set astir, set fire to, set on fire, set right,
   set straight, shake up, show up, steam up, stir, stir the blood,
   stir the embers, stir the feelings, stir up, summon up,
   tell the truth, turn on, unblindfold, uncharm, undeceive, unspell,
   wake, waken, warm, warm the blood, whip up, work into, work up