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

Relevance

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

Expect travelers working on laptops by day, and by night, the motorized liquor riser—stacked with 1,500 bottles—steals the spotlight, a clever riff on NYC’s old automats.

— Condé Nast, Condé Nast Traveler, 7 July 2026
Torbert has been a steady riser in the recruiting rankings, climbing from the mid-300s earlier this year to his current spot in the top 100.

— Austin Meek, New York Times, 2 July 2026

Definition of riser

Adjective

When Isul woke, a few hours later, Bo was struggling to stay awake in a chair next to her bed.

— Min Jin Lee, New Yorker, 19 July 2026
If racing thoughts and elevated cortisol are what’s keeping you awake, this one targets the underlying problem rather than sedating you into unconsciousness.

— Lauren Jarvis-Gibson July 18, Fort Worth Star-Telegram, 18 July 2026

Definition of awake

Adjective

Like most expectant parents, Briana Faucette heard the typical warnings about sleepless nights.

— Roni Robbins, AJC.com, 20 July 2026
No, special teams coach Dave Toub shouldn’t spend sleepless nights scheming up how to improve his team’s field-goal defense for next season.

— Jesse Newell, New York Times, 15 July 2026

Definition of sleepless

Browse Nearby Words

insomnia

insomniac

insomniacs

See all Nearby Words

Cite this Entry

Style

“Insomniac.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/insomniac. Accessed 25 Jul. 2026.

Copy Citation

Synonyms of insomniac

adjective

noun

Example Sentences

Browse Nearby Words

Cite this Entry

More from Merriam-Webster

Word of the Day

vituperate

Popular in Grammar & Usage

Democracy or Republic: What's the difference?

Merriam-Webster’s Great Big List of Words You Love to Hate

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

Do you 'say your piece' or 'say your peace'?

Why is '-ed' sometimes pronounced at the end of a word?

Popular in Wordplay

It's a Scorcher! Words for the Summer Heat

The Longest Long Words List

Ten Words Ending with a Silent ‘T’

The Words of the Week - Jul 24

Why do we say 'fly off the handle'?

Popular

Democracy or Republic: What's the difference?

It's a Scorcher! Words for the Summer Heat

The Longest Long Words List

Games & Quizzes