WACKO Synonyms: 176 Similar and Opposite Words

wacko 1 of 2

adjective

ˈwa-(ˌ)kō

variants also whacko

Definition of wacko

as in absurd

showing or marked by a lack of good sense or judgment a completely wacko obsession with cleaning

Synonyms & Similar Words

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Antonyms & Near Antonyms

wacko

2 of 2

noun

variants also whacko

as in eccentric

a person of odd or whimsical habits Some think he is a wacko but I consider him a genius.

Synonyms & Similar Words

Antonyms & Near Antonyms

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 wacko

Adjective

This wacko crew was one of the greatest things in the history of television. — Jordan Hoffman, EW.com, 14 Aug. 2025 Sounds crazy, but when has UAB football not been completely wacko. — Joseph Goodman | [email protected], al, 16 Dec. 2022

Noun

Out of nowhere, there’s a wacko outdoor puppet theater production by a troupe that operates like a New Age cult. — Charles McNulty, Los Angeles Times, 25 June 2024 This is a wacko package to be sure, and overlong at two-and-three-quarter hours, so mileage will vary even for devoted Lanthimos fans. — David Rooney, The Hollywood Reporter, 17 May 2024 See All Example Sentences for wacko

Recent Examples of Synonyms for wacko

Adjective

Even when Romanzy goes off on how stupid and ugly Caleb is — and gossips that his parents abandoned him because something must be wrong with him — Mary goes along with it.

— Maggie Fremont, Vulture, 11 July 2026
Shockingly, the letter seems to be pushing for a return to standardized tests by, in effect, arguing that a growing percentage of their students are simply too stupid to succeed, no matter what professors do.

— Los Angeles Times, Los Angeles Times, 8 July 2026

Definition of stupid

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

Adjective

Sevigny holds firm to Tatum’s hard-to-love jerkishness, which helps smooth over the serious arguments that can turn inadvertently silly (and amplifies the purely silly ones).

— Ben Travers, IndieWire, 9 July 2026
The post also included a sweet selfie with her two younger sons, with Mateo smiling widely and Ciro making a silly face for the camera.

— Charna Flam, PEOPLE, 8 July 2026

Definition of silly

Noun

Wicked Wonderland follows 2024’s The Rise of Red, where Cantrall’s character and Cinderella’s daughter Chloe (Malia Baker) team up to go back in time and reverse the event that resulted in the Queen of Hearts’ evil path.

— Gabrielle Rockson, PEOPLE, 15 July 2026
What saves Hyperdrive is the dry humour and the slightly insane set and character design.

— William Worrall, Space.com, 15 July 2026

Definition of character

Adjective

Johnson continued this week to push for his foolish and counterproductive desire to impose a $33-per-month tax on each Chicago job generated by the city’s largest private-sector employers.

— The Editorial Board, Chicago Tribune, 10 July 2026
As is, this is a foolish thriller that prompts the occasional snicker but not much more.

— Randy Myers, Mercury News, 9 July 2026

Definition of foolish

Noun

By the early 1990s, Eugene had earned itself a reputation as a beacon of progressive-minded irreverence, drawing a pungent mix of weirdos, iconoclasts, and freethinkers.

— Literary Hub, Literary Hub, 10 July 2026
Generation after generation of cretins and weirdos become Ramones lovers.

— SPIN Staff, SPIN, 7 July 2026

Definition of weirdo

Noun

Artists have always used music to question authority and expose the cracks (and the crackpots) in the American story.

— Time, Time, 6 May 2026
In one corner, the heartless girlboss; in the other, the crackpot conspiracy theorist (who just happens to be more sympathetic and charismatic than such types usually are).

— Nate Jones, Vulture, 31 Jan. 2026

Definition of crackpot

Browse Nearby Words

wackiness

wacko

wackos

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Style

“Wacko.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/wacko. Accessed 17 Jul. 2026.

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Synonyms of wacko

adjective

noun

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