PSYCHO Synonyms: 96 Similar and Opposite Words

psycho

adjective

Definition of psycho

informal + disparaging

as in psychotic

unable to think in a clear or sensible way Only someone who is totally psycho could have committed such a heinous crime.

Synonyms & Similar Words

Relevance

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 psycho Which is psycho, absolutely psycho. — Ryan Coleman, Entertainment Weekly, 27 May 2026 The key figure turns out to be Alex’s mysterious Aunt Gladys, played in full psycho-biddy drag by Amy Madigan. — Louis Peitzman, Vulture, 8 Aug. 2025

Recent Examples of Synonyms for psycho

Adjective

It may also be used to treat certain other psychotic conditions, such as psychosis arising in Parkinson disease.

— Encyclopedia Britannica, Encyclopedia Britannica, 7 Oct. 2026
At trial, a neurological expert testified that Linton had a seizure in the lead up to the collision, and a psychiatrist said Linton displayed psychotic symptoms weeks after the crash that were consistent with the aftermath of a seizure.

— James Queally, Los Angeles Times, 1 Oct. 2026

Definition of psychotic

Adjective

The ball popped out of his glove and fell in front of him, creating a bit of a mad scramble for Ramírez.

— Andy Martinez, Chicago Tribune, 8 Oct. 2026
Some reports have suggested that Harry knew the contents of the memoir before it was published, which reportedly adds to William’s reasons to be mad at his brother.

— StyleCaster Editors, StyleCaster, 7 Oct. 2026

Definition of mad

Adjective

First and foremost, as a homeowner myself the property taxes are insane and continue to go up.

— Stephen Korka, Sun Sentinel, 13 Oct. 2026
That may be the name of her next album, but Venus’ insane popularity also speaks to the way Metropia is moving forward, constantly looking for the next shiny thing.

— Kate Erbland, IndieWire, 10 Oct. 2026

Definition of insane

Adjective

Rihanna’s here, maniacal crowds are lining up outside shows to screech and wave at their favorite stars and days of runway events big and small lie ahead.

— Leah Dolan, CNN Money, 30 Sep. 2026
These machines—the maniacal Maverick R, with its praying mantis-like front suspension, and the hard-working Pioneer—have little else in common.

— Caleb Jacobs, The Drive, 2 Sep. 2026

Definition of maniacal

Adjective

Women naturally store less creatine than men, and during perimenopause and menopause, declining estrogen can take a toll on both muscle health and mental clarity.

— Maggie Ryan, Flow Space, 15 Oct. 2026
Steeped in therapy culture and financial literacy content, young Americans are fluent in boundary-setting and open to frank conversations about money and mental load.

— Grace Kelleher, Los Angeles Times, 15 Oct. 2026