Opposite words for asleep:
conscious, awakened, sensible, aware, vital, animate, going, live, alive, functioning, quick, aroused, reawakened, wakeful, feeling, astir, vibrant, up, active, lively, awake, running, vivacious, roused, wide-awake, animated, sensitive, operative, revived, dynamic, wakened, living, breathing, thriving, sleepless.
Usage samples:
  1. " I was asleep, the first time," he said.
    "The After House", Mary Roberts Rinehart.
  2. " It is the child," they thought, still half asleep, and were angry at being disturbed.
    "Invisible Links", Selma Lagerlof.
  3. " He is asleep," she told him.
    "The Bells of San Juan", Jackson Gregory.
  4. I was dog- tired, and in ten minutes fell fast asleep.
    "The Mystery of the Green Ray", William Le Queux.