1. (noun) wakefulness
a periodic state during which you are conscious and aware of the world
Synonyms: vigilance, alertness, sleeplessness, watchfulness
Antonyms: somnolence, sleepiness, drowsiness
2. (noun) wakefulness, sleeplessness
a temporary state in which you are unable (or unwilling) to sleep
Synonyms: vigilance, alertness, sleeplessness, watchfulness, wakefulness
Antonyms: somnolence, drowsiness, sleepiness
3. (noun) watchfulness, wakefulness, vigilance, alertness
the process of paying close and continuous attention
Synonyms: alerting, alertness, wakefulness, on the qui vive, sharp-sightedness, weather eye, watchfulness, sleeplessness, vigilance
Antonyms: somnolence, sleepiness, drowsiness
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Synonyms for wakefulness 
