Sleep"less*ness

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
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