RIGOROUS Synonyms: 239 Similar and Opposite Words

Q: How is the word 'rigorous' distinct from other similar adjectives?

Some common synonyms of rigorous are rigid , strict , and stringent . While all these words mean "extremely severe or stern," rigorous implies the imposition of hardship and difficulty. // the rigorous training of recruits

Q: When can 'rigid' be used instead of 'rigorous'?

While in some cases nearly identical to rigorous , rigid implies uncompromising inflexibility. // rigid rules of conduct

Q: When would 'strict' be a good substitute for 'rigorous'?

Although the words strict and rigorous have much in common, strict emphasizes undeviating conformity to rules, standards, or requirements. // strict enforcement of the law

Q: When might 'stringent' be a better fit than 'rigorous'?

The synonyms stringent and rigorous are sometimes interchangeable, but stringent suggests severe, tight restriction or limitation. // stringent standards of admission

rigorous

adjective

ˈri-g(ə-)rəs

Definition of rigorous

as in strict

given to exacting standards of discipline and self-restraint a rigorous football coach who pushes his players to their physical and mental limits

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Antonyms & Near Antonyms

as in accurate

meeting the highest standard of accuracy a rigorous analysis of the data

Synonyms & Similar Words

Antonyms & Near Antonyms

as in stringent

not allowing for any exceptions or loosening of standards a rigorous diet and exercise regimen

Synonyms & Similar Words

Antonyms & Near Antonyms

as in difficult

requiring considerable physical or mental effort studied for umpteen months for the rigorous exam

Synonyms & Similar Words

Antonyms & Near Antonyms

Synonym Chooser

How is the word rigorous distinct from other similar adjectives?

Some common synonyms of rigorous are rigid, strict, and stringent. While all these words mean "extremely severe or stern," rigorous implies the imposition of hardship and difficulty.

the rigorous training of recruits

When can rigid be used instead of rigorous?

While in some cases nearly identical to rigorous, rigid implies uncompromising inflexibility.

rigid rules of conduct

When would strict be a good substitute for rigorous?

Although the words strict and rigorous have much in common, strict emphasizes undeviating conformity to rules, standards, or requirements.

strict enforcement of the law

When might stringent be a better fit than rigorous?

The synonyms stringent and rigorous are sometimes interchangeable, but stringent suggests severe, tight restriction or limitation.

stringent standards of admission

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 rigorous Housed in an imposing Art Nouveau building in the heart of Old Havana, the school combines rigorous dance training with academic classes in math, Spanish, history and science. — ABC News, 29 Sep. 2026 Much like her character Maya, Kedia balanced pursuing the performing arts with a rigorous academic schedule. — Brianna J. Heath, Footwear News, 29 Sep. 2026 But whether that passion requires taxpayers to subsidize new facilities every time leagues and franchises ask for them needs rigorous scrutiny. — Abigail Hall, The Conversation, 29 Sep. 2026 Jensen Huang had spent decades building a distinctive internal cadence characterized by deep immersion in product reviews, rigorous group discussions, and an unrelenting emphasis on long-term architecture over short-term reaction. — Harvard Business Review, 29 Sep. 2026 See All Example Sentences for rigorous

Recent Examples of Synonyms for rigorous

Adjective

Swift intervention reversed their decline after Aldabra was designated a strict nature reserve in 1981 and a UNESCO World Heritage site in 1982.

— Mrigakshi Dixit, Interesting Engineering, 10 Oct. 2026
The great innovator of fashion photography, the revolutionary, was also a strict traditionalist.

— Vince Aletti, New Yorker, 10 Oct. 2026

Definition of strict

Adjective

Moreover, the company says automatic workout recognition is twice as accurate as before, with 50% fewer missed activities.

— Andrew Gebhart, PC Magazine, 12 Oct. 2026
Google says the new model means auto activity tracking is twice as accurate and supports over 100 activities.

— Victoria Song, The Verge, 12 Oct. 2026

Definition of accurate

Adjective

A lot of people complain about how long the permit approval process takes in stringent Coral Gables.

— Michelle Marchante, Miami Herald, 5 Oct. 2026
If the changes are approved, Head Start would defer to state and local childcare standards, which some researchers have found to be less stringent than the program’s longtime requirements.

— Maia Nehme, Hartford Courant, 4 Oct. 2026

Definition of stringent

Adjective

Performances across the board are strong, even if the characterizations themselves are more difficult to embrace.

— Guy Lodge, Variety, 11 Oct. 2026
Making short-haul rail more competitive Parallel argues that its system could open routes that are currently difficult for conventional rail services to serve economically, particularly journeys under 500 miles.

— Kaif Shaikh, Interesting Engineering, 11 Oct. 2026

Definition of difficult

Adjective

Now, Germino says her social media presence is all about giving other patients going through the same tough decision an example of someone who’s thriving after the procedure.

— Kara McGrath, Allure, 6 Oct. 2026
Prime Minister Sébastien Lecornu's administration is about to start tough budget negotiations against a backdrop of division and economic turmoil.

— Chloe Taylor,Jenni Reid, CNBC, 6 Oct. 2026

Definition of tough

Adjective

But actually, the precise challenge was to not treat it as a joke.

— Annika Pham, Variety, 12 Oct. 2026
The smaller probe will then head toward the asteroid's surface, a descent that should take two to three hours depending on 269 Justitia's precise gravity, which remains unknown.

— Sharmila Kuthunur, Space.com, 12 Oct. 2026

Definition of precise

Adjective

Disappointingly, her screenplay proceeds to unfold in a procession of frustrating get-outs and compromises, repeatedly choosing the least interesting or challenging direction to take this would-be throuple.

— Guy Lodge, Variety, 11 Oct. 2026
Oscar-winning DoP Greig Fraser knows a thing or two about working on challenging movies, from Dune to The Batman, Rogue One to Zero Dark Thirty.

— Andreas Wiseman, Deadline, 10 Oct. 2026

Definition of challenging

Adjective

Growing up under the harsh system of segregation influenced Pillay's interest in human rights and the law.

— Arkansas Online, Arkansas Online, 10 Oct. 2026
Growing up under the harsh system of segregation influenced Pillay’s interest in human rights and the law.

— Stefanie Dazio, Los Angeles Times, 9 Oct. 2026

Definition of harsh

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“Rigorous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/rigorous. Accessed 14 Oct. 2026.

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Synonyms of rigorous

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