HELLACIOUS Synonyms: 154 Similar and Opposite Words

hellacious

adjective

ˌhe-ˈlā-shəs

Definition of hellacious

as in intense

extreme in degree, power, or effect the hellacious heat was more than we could bear

Synonyms & Similar Words

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Antonyms & Near Antonyms

as in difficult

requiring considerable physical or mental effort the pioneers survived a particularly hellacious river crossing with their covered wagon barely in one piece

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 hellacious His hellacious brand of defense is a nightmare for opposing benches in particular. — Bryan Toporek, Forbes.com, 18 May 2026 The skiers were in a valley below Perry Peak, but the two survivors have described battling through hellacious conditions in the hour before the avalanche. — Andrew Graham april 2, Sacbee.com, 2 Apr. 2026 But the tour was a hellacious time for Bachman. — Andy Greene, Rolling Stone, 28 Feb. 2026 Even against a hellacious Houston defense, the Patriots’ shortest path to victory is to ask Maye to carry them yet again. — Andrew Callahan, Boston Herald, 15 Jan. 2026 See All Example Sentences for hellacious

Recent Examples of Synonyms for hellacious

Adjective

Utilities have raised rates to pay for wildfire prevention and recovery as climate change has made the blazes more intense and frequent.

— Sophie Austin, Fortune, 25 Aug. 2026
Electrolyte beverages can help replenish hydration after an intense workout or stomach bug.

— Stephanie Brown, Verywell Health, 25 Aug. 2026

Definition of intense

Adjective

The California Board of Pharmacy in 2025 reversed course on regulations that would have made the supplement more difficult to acquire after pushback from some firefighters.

— ABC News, ABC News, 23 Aug. 2026
Striking out on her own was a difficult transition, but embracing her solitude gave her the space to learn more about herself and make her own personal decisions, such as getting her cat or making meals of her choosing.

— Amen Galinato, CNN Money, 23 Aug. 2026

Definition of difficult

Adjective

By the twentieth century, intensive farming practices had left the South dangerously vulnerable to erosion, producing depleted swaths of land where kudzu would later flourish.

— The Editors, JSTOR Daily, 26 Aug. 2026
The next day, Alex Pretti, an intensive-care nurse and a lifelong Catholic, was shot and killed by federal agents.

— Bill McKibben, New Yorker, 26 Aug. 2026

Definition of intensive

Adjective

Sharing her new life on social media helped give Hoadley a sense of empowerment despite her challenging circumstances.

— Amen Galinato, CNN Money, 23 Aug. 2026
The Heart Is a Lonely Hunter Carson McCullers’ remarkable debut novel tells a story of the American South, one set in Georgia and peopled with a cast of characters that exist in a rich, layered, and challenging reality.

— Caroline Rogers, Southern Living, 22 Aug. 2026

Definition of challenging

Adjective

The war, and in particular Iran’s direct targeting of the Gulf, makes this approach a tough pill to swallow.

— Dina Esfandiary, Foreign Affairs, 27 Aug. 2026
The conversation shifted from tougher ordinances toward resource allocation and investing in third spaces, which are places outside of work, school or home.

— Charlotte Observer, Charlotte Observer, 27 Aug. 2026

Definition of tough

Adjective

After surviving a ferocious first half to trail only 13-12, the All Blacks' resolve hardened by new coach Dave Rennie and age-old ability to produce something from nothing turned a tense contest into a rout by five tries to South Africa's one.

— ABC News, ABC News, 22 Aug. 2026
One track consists of her ferocious, transfixing, concept works, which plunge the gathered into the heart and soul of extreme historical and cultural experiences.

— Matt Thompson, SPIN, 21 Aug. 2026

Definition of ferocious

Adjective

Building trust requires a strong data foundation, rigorous quality standards and clear visibility into how insights are generated.

— David Tobias, Forbes.com, 21 Aug. 2026
Every personal finance product review is based on rigorous reporting by our team of expert writers and editors with extensive knowledge of mortgage products.

— Kelsey Neubauer, CNBC, 21 Aug. 2026

Definition of rigorous

Browse Nearby Words

hell

hellacious

hell-bent

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“Hellacious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/hellacious. Accessed 28 Aug. 2026.

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Synonyms of hellacious

adjective

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