Antonyms of sleep:
wake, agitation, disturbance, movement, stir, tumult, commotion, excitement, restlessness, strain, unrest, disquiet, motion, rush, toil, work, insomnia, sleeplessness, consciousness, wakefulness, immortality, life span, lifetime, existence, life, creation, genesis, origination, rise, birth, nativity.
Examples of usage:
  1. Only think- they would all go to sleep.
    "Whosoever Shall Offend", F. Marion Crawford.
  2. I diden sleep much, though.
    "Harding's luck", E. [Edith] Nesbit.
  3. Where could he sleep?
    "The Lights and Shadows of Real Life", T.S. Arthur Edition: 10 Language: English.