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

Relevance

Antonyms & Near Antonyms

as in challenging

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

Synonyms & Similar Words

Antonyms & Near Antonyms

Synonym Chooser

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 As for Hollywood’s newest mogul, the sky is the limit, unless, of course, the debt becomes too onerous. — Brent Lang, IndieWire, 2 Oct. 2026 While JPMorgan faces a vast and onerous regulatory burden—a legacy of all the financial crises caused by bank failures—BlackRock is still relatively lightly regulated. — Robin Wigglesworth, Fortune, 29 Sep. 2026 While the most onerous traffic delays — the 20-minute holds — are largely over, Kionka said, motorists should still expect some impacts for the remainder of the project, including occasional traffic shifts, closures and detours. — Robert Tann, Denver Post, 24 Sep. 2026 Brussels needs to reverse course and rethink its onerous technology regulations. — Andrew McAfee, Foreign Affairs, 23 Sep. 2026 See All Example Sentences for onerous

Recent Examples of Synonyms for onerous

Adjective

Winning means making much tougher decisions about what to put on the floor.

— Nicholas Wu, semafor.com, 27 Oct. 2026
Flournoy made some tough grabs downfield, and Lamb punctuated the night with two touchdown grabs.

— Nick Harris, Fort Worth Star-Telegram, 27 Oct. 2026

Definition of tough

Adjective

Such calculations are part of a wider effort to understand why molecular simulations remain challenging.

— Rupendra Brahambhatt, Interesting Engineering, 24 Oct. 2026
But the shift in college athletics has required an internal reconciling that is even more challenging than the external education.

— Dana O’Neil, CNN Money, 24 Oct. 2026

Definition of challenging

Adjective

Jarman, who came in as the defending champion on the event, put together a more difficult routine but was nicked by judges for his execution.

— ABC News, ABC News, 24 Oct. 2026
This is the last remaining game on the schedule that should be very difficult.

— David Troy OutKick, FOXNews.com, 24 Oct. 2026

Definition of difficult

Adjective

The citizens group hoping to reform Connecticut’s oppressive property tax system will release its recommendations Monday, hoping to force candidates for state offices to take positions during the final push toward Election Day.

— Keith M. Phaneuf, Hartford Courant, 22 Oct. 2026
If Chrissie represents someone who opts into the ruling system, Paul’s character shows that there are choices even within this world’s oppressive parameters.

— Natasha O'Neill, Vanity Fair, 22 Oct. 2026

Definition of oppressive

Adjective

And as routine tasks are automated, workers could lose opportunities to develop the experience needed for more demanding work.

— Lindsay Dodgson, CNBC, 24 Oct. 2026
The Sun enters your 12th House, drawing your attention toward rest, reflection, privacy, unfinished matters, and everything easier to hear when the outside world becomes less demanding.

— Tarot.com, New York Daily News, 23 Oct. 2026

Definition of demanding

Adjective

Interviews are supplemented with archival clips of Perry’s screen work and interviews, and some of the show’s most searing material is conveyed in the actor’s own (previously recorded and publicized) voice.

— Alison Herman, Variety, 27 Oct. 2026
The result of hours of chopping, searing, and mixing is our second annual Gear of the Year list.

— Editors of Bon Appétit, Bon Appetit Magazine, 27 Oct. 2026

Definition of searing

Adjective

The 62-year-old man, a lifelong resident of Athens, said the cost of gas, utilities and groceries have become burdensome.

— Saige Miller, NPR, 23 Oct. 2026
Tracking sleep and other vitals can help people improve their health—but wearing a tracker can feel burdensome.

— Erica Sweeney, Time, 15 Oct. 2026

Definition of burdensome

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one-on-one

onerous

ones

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“Onerous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/onerous. Accessed 30 Oct. 2026.

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