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

These ripples are associated with spikes of activity in the prefrontal cortex, and scientists only observe them during periods of sleep or quiet, wakeful rest.

— Sean Mccabe, Hartford Courant, 18 Oct. 2026
In a previous university blog post, Majumdar compared this finding to the brain flushing out byproducts that build up during active, wakeful moments, allowing for a more restful night’s sleep.

— Mack DeGeurin, Popular Science, 9 Sep. 2026

Definition of wakeful

Noun

Jansen was beaten through the gate by a Hazlewood nip-backer on 35, and Simon Harmer went in the same over to a riser that brushed his glove and shoulder and that Carey had to leap high for.

— ABC News, ABC News, 13 Oct. 2026
Meanwhile, the rear panel features a 120mm fan on a dual-format 140mm/120mm mount, and a removable seven-slot expansion card bracket that can be rotated counter-clockwise to support vertical graphics-card mounting via a riser cable (not included).

— Thomas Soderstrom, PC Magazine, 10 Oct. 2026

Definition of riser

Adjective

The idea, to hear Chatten tell it, was to shake their listeners awake with a catastrophic warning.

— Conçetta Ciarlo, Vogue, 14 Oct. 2026
That could mean recognizing the same conflict happening repeatedly with a co-worker, lying awake each night with racing thoughts, or turning to food or cigarettes during periods of stress, according to Resnick.

— Melissa Rudy, FOXNews.com, 12 Oct. 2026

Definition of awake

Browse Nearby Words

insomnia

insomniac

insomniacs

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Style

“Insomniac.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/insomniac. Accessed 21 Oct. 2026.

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Synonyms of insomniac

adjective

noun

Example Sentences

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