INSOMNIAC Synonyms: 40 Similar and Opposite Words

insomniac 1 of 2

adjective

in-ˈsäm-nē-ˌak

Definition of insomniac

as in wakeful

not sleeping or able to sleep an insomniac veteran tormented by his memories of the war

Synonyms & Similar Words

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Antonyms & Near Antonyms

insomniac

2 of 2

noun

as in riser

Related Words

riser
waker

Dissimilar Words

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of insomniac

Adjective

Even an insomniac film critic couldn’t see half of the films playing Fantasia 2025 during the three weeks of the festival. — Scott Phillips, Forbes.com, 6 Aug. 2025 The four-time Grammy winner dazzled exhibitors with a mini-concert at CinemaCon to jazz them up for the film, which follows a version of himself, an insomniac musician, who encounters a mysterious stranger. — Anthony D'alessandro, Deadline, 14 May 2025

Noun

And for a generation of insomniacs, nothing embodied the late-night spirit like Adult Swim. — Eric Vilas-Boas, Vulture, 18 Mar. 2026 Even for seasoned insomniacs, these changes can feel drastic. — Ellen O’Brien, SELF, 25 Feb. 2026 See All Example Sentences for insomniac

Recent Examples of Synonyms for insomniac

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

Noun

Thanks to a fallen tree limb, and because of the holiday, our shack on Shabbona was without power for four days, or until a replacement riser pole which connects us to the grid was replaced the following Tuesday.

— Jerry Shnay, Chicago Tribune, 24 Aug. 2026
Eric Morris is this tier’s big riser, up three tiers after coming one game away from taking North Texas to the CFP.

— Chris Vannini, New York Times, 18 Aug. 2026

Definition of riser

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

Definition of awake

Browse Nearby Words

insomnia

insomniac

insomniacs

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Cite this Entry

Style

“Insomniac.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/insomniac. Accessed 3 Sep. 2026.

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Synonyms of insomniac

adjective

noun

Example Sentences

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Cite this Entry

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