SLEEPLESS Synonyms: 34 Similar and Opposite Words

sleepless

adjective

ˈslēp-ləs

Definition of sleepless

as in wakeful

not sleeping or able to sleep lay sleepless with worry

Synonyms & Similar Words

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Antonyms & Near Antonyms

Example Sentences

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Recent Examples of sleepless Today, there are no more bodies left to bury, but those sleepless nights remain. — Bo Evans, CBS News, 2 July 2026 Fatigue, severe pain, heavy and irregular flow, sleepless nights on the bathroom floor. — Escher Walcott, PEOPLE, 16 June 2026 New dads face psychological pressures, from sleepless nights to sky-high bills, which can contribute to postpartum depression. — Keith Wagstaff, Los Angeles Times, 10 June 2026 An all-stock portfolio would mean sleepless nights for a saver no longer in the work force. — William Baldwin, Forbes.com, 6 June 2026 See All Example Sentences for sleepless

Recent Examples of Synonyms for sleepless

Adjective

Low to medium doses show a reduction in the alpha frequency of brain waves (which correspond to relaxed and wakeful states), along with rising entropy, a signature finding of sober brains sinking deeper into a trip.

— Oshan Jarow, Vox, 4 Nov. 2024
Having the right pillow can make a big difference between a peaceful night’s sleep and a restless, wakeful one.

— Casey Clark, Peoplemag, 9 Sep. 2024

Definition of wakeful

Adjective

Anabel Kingsley, consultant trichologist and brand president of the Philip Kingsley Clinics and product ranges, has clients who stay awake long into the night, comparing photos before and after shedding events.

— Maggie Ryan, Flow Space, 25 Aug. 2026
In September, a driver was seen appearing to doze off as a train accelerated to 50 mph before the operator was jolted awake.

— ABC News, ABC News, 25 Aug. 2026