Synonyms of sleepiness

sleepiness

noun

as in drowsiness

the quality or state of desiring or needing sleep

the truck driver keeps a thermos of coffee with him to stave off sleepiness

Synonyms & Similar Words

• drowsiness
• fatigue
• sleeping
• somnolence
• tiredness
• resting
• lethargy
• slumbering
• doziness
• weariness
• torpidity
• sluggishness
• torpor
• lassitude
• dozing
• oversleeping

Antonyms & Near Antonyms

• insomnia
• consciousness
• wakefulness
• awareness
• sleeplessness

Example Sentences

Recent Examples of sleepiness

Loud snoring, daytime sleepiness and obesity are common signs. — Hanna Wickes, Kansas City Star, 4 Aug. 2026

The benefits of an early nap can wear off too early in the day, leading to afternoon sleepiness. — Heidi Moawad, Verywell Health, 21 July 2026

Melatonin the hormone released at night that triggers sleepiness also declines with age, and perimenopause brings a significant drop that makes sound sleep harder to come by. — Hanna Wickes, Fort Worth Star-Telegram, 17 July 2026

Gamma-wave strength rose across brain regions during therapy, and sleepiness was the most common side effect. — Samantha Agate, Sacbee.com, 13 July 2026

The clinical data demonstrated significant improvements in wakefulness and reductions in excessive daytime sleepiness at week eight, outperforming the placebo with a generally favorable safety profile. — Sasirekha Subramanian, Forbes.com, 29 June 2026

In the study, people who reported excessive daytime sleepiness had higher odds of hypertension than those who didn’t. — Zoe Cunniffe, Health, 18 June 2026

Researchers measured insomnia severity using the Insomnia Severity Index, along with sleep maintenance, daytime sleepiness, fatigue, anxiety and depression symptoms. — Samantha Agate, Charlotte Observer, 7 May 2026

Mention any daytime symptoms, such as excessive sleepiness or headaches, and any nighttime symptoms, such as frequent urination, waking up short of breath, snoring or insomnia. — Erika Yamazaki, The Conversation, 6 May 2026