Definition for Insomniac:

• someone who cannot sleep

Synonyms for Insomniac:

• adj.

  •all (adjective)
  • sleepless,
  • watchful,
  • insomniac.
  •unsleeping (adjective)
  • awake.
  •wakeful (adjective)
  • on the alert,
  • heedful,
  • on the lookout,
  • unsleeping,
  • attentive,
  • on the qui vive,
  • wide-awake,
  • careful,
  • vigilant,
  • observant,
  • on alert,
  • on lookout,
  • wideawake,
  • Insomnious,
  • alive,
  • astir,
  • wary,
  • on guard.

• n.

  •
  • insomnia,
  • patient,
  • bad night,
  • waking,
  • toss and turn,
  • light sleeper,
  • up,
  • conscious,
  • broken sleeper.
  •person (noun)
  • sleepless person.

• Other synonyms:

  •adj.
  • wakeful.
  •n.
  • diseased person,
  • sick person,
  • sufferer.

Antonyms for Insomniac:

• adj.

  • wakeful
    unaware, sleepy.
  • Other antonyms:
    napping, slumbering, nodding, dreaming, asleep, mesmerized, slumberous, dormant, dozing, sleeping, drowsy, hypnotized, unawakened, dozy, somnolent.

Hyponym for Insomniac:

• n.

  • person
    sick person, sufferer, diseased person.