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Pronunciation varies by accent · noun
Lack of sleep; the property of being sleepless; the inability to sleep, insomnia..
Use sleeplessness when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Sleeplessness means Lack of sleep; the property of being sleepless; the inability to sleep, insomnia..
Common synonyms include insomnolence, wakefulness.
Possible antonyms include sleep, sleepiness, somnolence, drowsiness.
Use sleeplessness where its definition matches the intended context.
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