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

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Example Sentences

Recent Examples of Synonyms for crackbrain

Noun

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
Make sure to practice a full range of motion with these and emphasize the eccentric (the way down) part of the movement for maximal time under tension and muscle-building stimulus.

— Jakob Roze, HEALTH, 19 Aug. 2026

Definition of eccentric

Noun

The conversation and the word itself, which gives the seventh and final episode its title, unlocks the Biblical underpinnings and the complexities governing many of the main characters.

— Daniel Fienberg, HollywoodReporter, 1 Oct. 2026
Still, the endeavor feels worth it for Pugh and Lee’s standout efforts, which etch their characters deep into one’s memory.

— Alison Herman, Variety, 1 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

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

Pairing fruits with protein or healthy fats, like nuts or cheese, can help slow digestion and reduce blood sugar spikes.

— Lauren Panoff, Verywell Health, 28 Sep. 2026
The nut is popping up on menus and in cookbooks, and experts are working to breed a sweeter variety, which could lead to a new era of acorn eating.

— Kate Morgan, Washington Post, 27 Sep. 2026

Definition of nut

Noun

Many spent their days suspended from steel cables, raised and lowered along the mountainside by hand cranks.

— Encyclopedia Britannica, Encyclopedia Britannica, 29 Sep. 2026
The engine features a flat-plane crank that Mercedes-Benz AMG said reduces rotating mass and improves revving characteristics.

— Joel Feder, The Drive, 10 Sep. 2026

Definition of crank

Noun

The highest elevations can see snow relatively early in the season, while lower elevations might go much longer without seeing a flake.

— Sacbee.com, Sacbee.com, 29 Sep. 2026
Tiny flakes landed on their hair, their sleeves and hands, the curves and notches of the gun.

— Tom Drury, Harpers Magazine, 29 Sep. 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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Style

“Crackbrain.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/crackbrain. Accessed 2 Oct. 2026.

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Synonyms of crackbrain

noun

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