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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Example Sentences

Recent Examples of Synonyms for crackbrain

Noun

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
No documentarian has a better eye for intriguing oddballs than Errol Morris, who built his feature film career on drawing them out in conversation, from pet-cemetery owners in Gates of Heaven to small-town eccentrics in Vernon, Florida.

— Judy Berman, Time, 11 Aug. 2026

Definition of eccentric

Noun

The Oscar-winning actress has written a new musical stage adaptation around the character, set to open on London’s prestigious theater scene in the summer of 2027.

— Lily Ford, HollywoodReporter, 27 Aug. 2026
The entire ensemble of cast led by Manoj, Divya, and Boman bring an incredible depth to their characters.

— Naman Ramachandran, Variety, 27 Aug. 2026

Definition of character

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

Beans and lentils, berries and other fruits, vegetables, nuts, and even oatmeal all provide fiber with a much broader package of nutrients.

— Amber Raiken, Verywell Health, 26 Aug. 2026
The high-protein snack in their kitchen is usually just an egg, a stick of cheese or a handful of nuts.

— Lauren Jarvis-Gibson, Miami Herald, 24 Aug. 2026

Definition of nut

Noun

Even at low speeds, the model variant’s flat-crank V-8 feels alive and brimming with 8,300 rpm of possibility.

— Basem Wasef, Robb Report, 26 Aug. 2026
That felt the opposite here,as Chandler and Pierre actually have great chemistry together — with Pierre delivering most of the thoughtful answers and Chandler playing the role of the lovable crank.

— Mike Ryan, IndieWire, 13 Aug. 2026

Definition of crank

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 29 Aug. 2026.

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Synonyms of crackbrain

noun

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