sleeplessness

from WordNet (r) 3.0 (2006)

sleeplessness
    n 1: a temporary state in which you are unable (or unwilling) to
         sleep; "accept your wakefulness and sleep in its own
         contrary way is more likely to come" [syn: {wakefulness},
         {sleeplessness}] [ant: {drowsiness}, {sleepiness},
         {somnolence}]

from The Collaborative International Dictionary of English v.0.48

Sleepless \Sleep"less\, a.
   1. Having no sleep; wakeful.
      [1913 Webster]

   2. Having no rest; perpetually agitated. "Biscay's sleepless
      bay." --Byron.
      [1913 Webster] -- {Sleep"less*ly}, adv. --
      {Sleep"less*ness}, n.
      [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

29 Moby Thesaurus words for "sleeplessness":
      acuity, acuteness, agility, alertness, all-night vigil, attention,
      attentiveness, brightness, consciousness, insomnia, insomniac,
      insomnolence, insomnolency, keenness, lidless vigil, nimbleness,
      promptitude, promptness, punctuality, quickness, readiness,
      restlessness, sentience, sharpness, smartness, tossing and turning,
      vigil, wake, wakefulness

[email protected]