ONEROUS Synonyms: 109 Similar and Opposite Words

Q: How does the adjective 'onerous' contrast with its synonyms?

Some common synonyms of onerous are burdensome , exacting , and oppressive . While all these words mean "imposing hardship," onerous stresses being laborious and heavy especially because distasteful. // the onerous task of cleaning up the mess

Q: In what contexts can 'burdensome' take the place of 'onerous'?

The synonyms burdensome and onerous are sometimes interchangeable, but burdensome suggests causing mental as well as physical strain. // burdensome responsibilities

Q: Where would 'exacting' be a reasonable alternative to 'onerous'?

While the synonyms exacting and onerous are close in meaning, exacting implies rigor or sternness rather than tyranny or injustice in the demands made or in the one demanding. // an exacting employer

Q: When might 'oppressive' be a better fit than 'onerous'?

In some situations, the words oppressive and onerous are roughly equivalent. However, oppressive implies extreme harshness or severity in what is imposed. // the oppressive tyranny of a police state

onerous

adjective

ˈä-nə-rəs

Definition of onerous

as in tough

difficult to endure had the onerous and stressful job of notifying the families of soldiers killed in action

Synonyms & Similar Words

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Antonyms & Near Antonyms

as in challenging

requiring much time, effort, or careful attention building the scale model of the frigate was an onerous task

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How does the adjective onerous contrast with its synonyms?

Some common synonyms of onerous are burdensome, exacting, and oppressive. While all these words mean "imposing hardship," onerous stresses being laborious and heavy especially because distasteful.

the onerous task of cleaning up the mess

In what contexts can burdensome take the place of onerous?

The synonyms burdensome and onerous are sometimes interchangeable, but burdensome suggests causing mental as well as physical strain.

burdensome responsibilities

Where would exacting be a reasonable alternative to onerous?

While the synonyms exacting and onerous are close in meaning, exacting implies rigor or sternness rather than tyranny or injustice in the demands made or in the one demanding.

an exacting employer

When might oppressive be a better fit than onerous?

In some situations, the words oppressive and onerous are roughly equivalent. However, oppressive implies extreme harshness or severity in what is imposed.

the oppressive tyranny of a police state

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 onerous In 2022, a Humans of New York post revealed that Rinaldi sells his sperm directly to prospective parents who are seeking to avoid the onerous costs of sperm banks and fertility treatments. — Joseph Konig, PEOPLE, 25 June 2026 This isn’t ideal, considering the onerous repeater tax that’s triggered when a team crosses the luxury-tax threshold in four straight seasons or four times during a five-season period. — Anthony Chiang june 23, Miami Herald, 23 June 2026 State lawmakers have stepped back from earlier, wider-ranging attempts to regulate AI that were vetoed or otherwise derailed by governors who viewed the measures as too onerous toward the industry’s development, including efforts to hold developers accountable for bias in AI systems. — Marc Levy, Los Angeles Times, 21 June 2026 The new bundle should help the two mid-tier services pool catalogues and blunt churn while minimizing the onerous cost of trying to compete on spending with the global giants. — Patrick Brzeski, HollywoodReporter, 17 June 2026 See All Example Sentences for onerous

Recent Examples of Synonyms for onerous

Adjective

White, when give the chance, has displayed a diverse offensive game, a defensive bent and an ability to make tough shots.

— Barry Jackson, Miami Herald, 17 July 2026
The stakes for new avatar don’t feel quite as high—the specific circumstances around the former was a perfect storm that'll be tough to duplicate—but the music isn’t any less potent for it.

— Lawrence Burney, Pitchfork, 16 July 2026

Definition of tough

Adjective

The method also relies on multiple Bell tests and assumptions about independent quantum sources, which could make large-scale implementation challenging.

— Rupendra Brahambhatt, Interesting Engineering, 18 July 2026
His 15-point first half Thursday included two threes, a high-degree-of-difficulty turnaround jumper and another challenging jumper.

— Barry Jackson, Miami Herald, 17 July 2026

Definition of challenging

Adjective

The couple made sure the design included a basement where the kids could spend time, better insulation to handle South Dakota’s harsh weather and plenty of storage — all features their previous home lacked.

— Tereza Shkurtaj, PEOPLE, 18 July 2026
Those are some of the harsh conditions that detainees in Immigration and Customs Enforcement custody described experiencing in recent weeks at the Federal Detention Center, a Bureau of Prisons facility located in a concrete tower in downtown Miami.

— Syra Ortiz Blanes, Miami Herald, 18 July 2026

Definition of harsh

Adjective

Unlike dogs, they cannot simply be taken on longer walks, often resist dietary changes, and can be difficult to medicate consistently, making GLP-1 therapies potentially attractive if clinical trials prove successful.

— Elsa Ohlen,Carolin Roth, CNBC, 18 July 2026
Their stories recount the devastation to homes and businesses, life in temporary shelters, and the difficult process of rebuilding or relocating.

— Michelle Oliva-Espinosa, Kansas City Star, 18 July 2026

Definition of difficult

Adjective

Underneath a sky of wildfire smoke and haze, the teams played through four hydration breaks, injury stoppages, oppressive summer heat and a patchy pitch.

— Meg Linehan, New York Times, 17 July 2026
Tenet is a collection of Nolan’s most frustrating habits cranked to 11 — from an oppressive soundscape that eclipses dialogue, to stylish yet flat characters, to a narrative that’s confusingly twisty to the point of contortion.

— James Hibberd, HollywoodReporter, 16 July 2026

Definition of oppressive

Adjective

Those efforts produced significant performance and efficiency gains for several of the laboratory’s most demanding applications.

— Aamir Khollam, Interesting Engineering, 17 July 2026
Yzerman was known as a demanding, intimidating general manager who could grind players in negotiations.

— Max Bultman, New York Times, 17 July 2026

Definition of demanding

Adjective

Severe droughts and searing heat across vast swathes of southern Europe destroyed large parts of the olive oil harvest, culminating in a dizzying price rally that shocked industry veterans and consumers alike.

— Sam Meredith, CNBC, 17 July 2026
Set in the immigrant neighborhoods of 1950s Brooklyn, Miller’s searing tragedy explores the tensions between devotion and desire, justice and loyalty, and the promise and pressures of the American Dream.

— Anthony D'Alessandro, Deadline, 14 July 2026

Definition of searing

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“Onerous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/onerous. Accessed 21 Jul. 2026.

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