insomniac

from WordNet (r) 3.0 (2006)

insomniac
    adj 1: experiencing or accompanied by sleeplessness; "insomniac
           old people"; "insomniac nights"; "lay sleepless all
           night"; "twenty watchful, weary, tedious nights"-
           Shakespeare [syn: {insomniac}, {sleepless}, {watchful}]
    n 1: someone who cannot sleep [syn: {insomniac}, {sleepless
         person}]

from Moby Thesaurus II by Grady Ward, 1.0

20 Moby Thesaurus words for "insomniac":
      alertness, all-night vigil, consciousness, insomnia, insomnious,
      insomnolence, insomnolency, lidless vigil, restless, restlessness,
      sentience, sleepless, sleeplessness, slumberless,
      tossing and turning, unsleeping, vigil, wake, wakeful,
      wakefulness

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