CRACKBRAIN Synonyms: 41 Similar and Opposite Words

crackbrain

noun

ˈkrak-ˌbrān

Definition of crackbrain

as in eccentric

a person of odd or whimsical habits a crackbrain who wore bedroom slippers to the grocery shop

Synonyms & Similar Words

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Recent Examples of Synonyms for crackbrain

Noun

Janney’s Silda, the wisecracking eccentric with an ax to grind, is the live wire of the company.

— Theater Critic, Los Angeles Times, 19 Oct. 2026
The public reckonings with these figures’ legacies—the troubled former child star gone too soon, the beloved icon, the cult favorite, the complicated eccentric—have come in a cascade.

— Michael Schulman, New Yorker, 5 Sep. 2026

Definition of eccentric

Noun

Earlier versions looked unnaturally green, while the team also considered how the character’s skin would react to different lighting.

— Davide Abbatescianni, Variety, 15 Oct. 2026
Coleman said each design has its own distinct character and can be styled individually, either as a subtle everyday detail or a sculptural statement.

— Tianwei Zhang, Footwear News, 15 Oct. 2026

Definition of character

Noun

My question is, with what AB did to the Raiders, Why would Gruden/Mayock want to take another head case like Jalen Ramsey?

— Jerry McDonald, The Mercury News, 20 Sep. 2019
Whiteside has a reputation of being a bit of a head case, and also, in need of motivation.

— oregonlive.com, oregonlive.com, 1 July 2019

Definition of head case

Noun

Another 24 new releases are lined up for the rest of the year; most of them originals (20) followed by new seasons (3) and a saga.

— Annika Pham, Variety, 15 Oct. 2026
According to the brand, the casks are rotated while aging to encourage interaction between liquid and wood, and like the original the gin spent 71 nights maturing.

— Jonah Flicker, Robb Report, 15 Oct. 2026

Definition of original

Noun

While Annie seemed like the odd duck out, her closest, idol-holding ally Alex seemed to be considering Sophi as his target, with the goal of taking out his bromance Jake’s other bestie.

— Nick Caruso, TVLine, 2 Oct. 2025
The Incredible Hulk' (2008) Before ultimately being replaced in other movies by Mark Ruffalo, Edward Norton starred as scientist Bruce Banner in this odd duck from the nascent MCU.

— Brian Truitt, USA Today, 25 July 2025

Definition of odd duck

Noun

In the mid-1990s, Bob Bartel, a Chicago native and sometime private detective and full-time Beatles nut, heard Louise speak at a fan convention about George’s vacation in Benton.

— Christopher Borrelli, Chicago Tribune, 18 Oct. 2026
Instead, look for more whole foods like fruits, vegetables, and nuts.

— Laura Bradley, HEALTH, 17 Oct. 2026

Definition of nut

Noun

Despite being a weird device with a black-and-white screen and a crank jutting out the side, the Playdate has managed to cultivate a strong and constantly growing library of games.

— Andrew Webster, The Verge, 9 Oct. 2026
Many spent their days suspended from steel cables, raised and lowered along the mountainside by hand cranks.

— Encyclopedia Britannica, Encyclopedia Britannica, 29 Sep. 2026

Definition of crank

Noun

Onigiri Gorichan serves delicate Koshihikari rice balls stuffed with salmon flakes, pickled plums or Spam and egg.

— Senior Food Editor, Los Angeles Times, 15 Oct. 2026
Some ski areas, keep non-snow activities going until the very first flake, such as Palisades Tahoe.

— Camila Pedrosa, Sacbee.com, 15 Oct. 2026

Definition of flake

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.

Browse Nearby Words

crack

crackbrain

crackbrained

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“Crackbrain.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/crackbrain. Accessed 20 Oct. 2026.

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Synonyms of crackbrain

noun

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