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
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Antonyms & Near Antonyms
Example Sentences
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Recent Examples of sleepiness
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
Common signs include loud snoring, waking up gasping, morning headaches and daytime sleepiness that doesn’t improve with more hours in bed.
—
Allison Palmer,
Sacbee.com,
18 May 2026
Shift Work Sleep Disorder, or SWSD, is the clinical name for the persistent insomnia or excessive sleepiness that lasts more than three months and is tied directly to a person’s work schedule.
—
Allison Palmer,
Fort Worth Star-Telegram,
16 May 2026
However, sleepiness returns when the caffeine wears off.
—
Ashley Olivine,
Verywell Health,
11 May 2026
Researchers also observed improvements in sleep maintenance and reductions in daytime fatigue, anxiety, depression symptoms and daytime sleepiness.
—
Samantha Agate,
Kansas City Star,
7 May 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
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
Common signs include loud snoring, waking up gasping, morning headaches and daytime sleepiness that doesn’t improve with more hours in bed.
—
Allison Palmer,
Sacbee.com,
18 May 2026
Shift Work Sleep Disorder, or SWSD, is the clinical name for the persistent insomnia or excessive sleepiness that lasts more than three months and is tied directly to a person’s work schedule.
—
Allison Palmer,
Fort Worth Star-Telegram,
16 May 2026
However, sleepiness returns when the caffeine wears off.
—
Ashley Olivine,
Verywell Health,
11 May 2026
Researchers also observed improvements in sleep maintenance and reductions in daytime fatigue, anxiety, depression symptoms and daytime sleepiness.
—
Samantha Agate,
Kansas City Star,
7 May 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
Recent Examples of Synonyms for sleepiness
Noun
-
Some symptoms of diphenhydramine poisoning include drowsiness, agitation, fast heart rate, nausea, vomiting, hallucinations, seizures, dangerous heart rhythm and loss of consciousness.
-
It is also known to cause side effects, including drowsiness, sedation and dizziness.
Noun
-
In an interview with Mental Floss, competitive eater Yasir Salem discusses how speed eaters will chew gum to strengthen their jaws to avoid fatigue during competitions.
-
Fifty years later, his military haircut glistens with silver from a lifetime serving in fatigues.
Noun
-
The floorplan is arranged with a clear separation between the living areas and private sleeping quarters of the home.
-
Fourth of July Camping Deals With markdowns on functional tents, sleeping bags, and rechargeable lanterns, there’s no better time to snag camping essentials.
Noun
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From there, the story builds on the uncertainty, rocking the somnolence of a small town in the province of Badajoz, and forcing a community to choose between disbelief and the need to prove what can’t be seen.
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The people went to the emergency department with tachycardia, confusion, anxiety or somnolence, and nausea after eating gummy candies labeled as containing Amanita muscaria mushrooms.
Cite this Entry
“Sleepiness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/sleepiness. Accessed 7 Jul. 2026.
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