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

Relevance

Antonyms & Near Antonyms

Example Sentences

Recent Examples of Synonyms for crackbrain

Noun

With its loose ends and digressions, Dream Me a Dream stays true to those idiosyncratic instincts while retaining enough of the welcoming glow of Dance of Love to make this an affecting farewell from an endearing eccentric.

— Stephen Thomas Erlewine, Pitchfork, 22 June 2026
The eccentric cuz is quick to try and help Bobby solve problems, which often gets him into trouble, but ultimately pushes him out of his shell.

— Skyler Trepel, Entertainment Weekly, 20 June 2026

Definition of eccentric

Noun

None of the characters has a convincing motivation for their actions or words.

— Jack Dunn, Variety, 30 July 2026
Nolan has cited Wilson's translation in discussing his approach to the film, but Wilson says she was disappointed with the adaptation — and especially by Nolan's rendering of the central character.

— Dave Davies, NPR, 29 July 2026

Definition of character

Noun

While nothing compares to the Hartford Whalers threads, the early-aughts uniforms improved on the original from 1997-98 with black outlining on the nameplate letters.

— The Athletic NHL Staff, New York Times, 1 Aug. 2026
Being able to rebuild it, remake it, and stay true to the original was incredibly important to all of us.

— Destiny Jackson, Deadline, 30 July 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

During an early-morning visit on July 22, inspectors documented that all residents were served corn flakes with milk, toast, and café con leche for breakfast, regardless of their dietary needs.

— Carol Marbin Miller, Miami Herald, 31 July 2026
Sprinkle with more red pepper flakes and drizzle with oil if desired.

— Claire Saffitz, Bon Appetit Magazine, 31 July 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

See all Nearby Words

Cite this Entry

Style

“Crackbrain.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/crackbrain. Accessed 5 Aug. 2026.

Copy Citation

Synonyms of crackbrain

noun

Example Sentences

Browse Nearby Words

Cite this Entry

More from Merriam-Webster

Word of the Day

colloquial

Popular in Grammar & Usage

7 Pairs of Commonly Confused Words

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

Is it 'nerve-racking' or 'nerve-wracking'?

'Sneaked' or 'Snuck': Which is correct?

Why does English have so many silent letters?

Popular in Wordplay

Dutch Treat and French Leave: Eight Place-Based Compounds

14 Phobias You Probably Haven't Heard Of

The Longest Long Words List

How long is a jiffy?

Even More Bird Names that Sound Like Insults (and Sometimes Are)

Popular

7 Pairs of Commonly Confused Words

Dutch Treat and French Leave: Eight Place-Based Compounds

14 Phobias You Probably Haven't Heard Of

Games & Quizzes