WELL-FOUNDED Synonyms: 112 Similar and Opposite Words

well-founded

adjective

ˈwel-ˈfau̇n-dəd

Definition of well-founded

as in logical

according to the rules of logic even a well-founded argument can lead to an erroneous conclusion if one of the premises is incorrect

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

as in reasonable

based on sound reasoning or information a well-founded complaint about the business's treatment of its customers

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 well-founded Many predicted this sort of mission-creep when VAR was in its infancy, and those warnings have proven well-founded. — Graham Scott, New York Times, 22 July 2026 Just make sure that your concerns are well-founded and not based on assumptions or stereotypes. — Sherri Gordon, Parents, 21 July 2026 Gen Z’s concerns are well-founded—and echo warnings from leading AI experts and mounting management evidence. — Steve Denning, Forbes.com, 14 June 2026 The opponents’ concerns are well-founded. — Alex Weatherall, Boston Herald, 10 June 2026 See All Example Sentences for well-founded

Recent Examples of Synonyms for well-founded

Adjective

Our tortured contemporary education is a logical outgrowth of its origin story.

— Kamau Bobb October 21, Literary Hub, 21 Oct. 2026
But with wingers like Temwa Chawinga and Michelle Cooper, the logical spot for her was striker.

— Daniel Sperry, Kansas City Star, 21 Oct. 2026

Definition of logical

Adjective

The old boy was perfectly reasonable, explaining the difference between federal reimbursement and state reimbursement, and the speed that agencies move on the different levels.

— Arkansas Online, Arkansas Online, 24 Oct. 2026
The enforcement stems from Spotify’s requirement that family plan members reside at the same address—a seemingly reasonable policy in concept.

— Nick Indge, ArsTechnica, 23 Oct. 2026

Definition of reasonable

Adjective

Radiation safety authorities approved the initial STUK evaluation in August 2026, paving the way for the government to grant an operating license valid through 2070.

— Mrigakshi Dixit, Interesting Engineering, 23 Oct. 2026
Boaters who already have valid Mussel Fee Stickers do not have to pay the higher fee until their stickers expire, California State Parks confirmed Friday.

— Daniel Hunt, Sacbee.com, 23 Oct. 2026

Definition of valid

Adjective

In layman’s terms, critical thinking is the ability to think independently by questioning claims, weighing evidence, and making reasoned judgments.

— Ted Ladd, Forbes.com, 29 Aug. 2026
None are credible challengers; Matt Conroy is the more reasoned and moderate of the three.

— The Editorial Board, Chicago Tribune, 11 Feb. 2026

Definition of reasoned

Adjective

Sometimes our rational understanding of life and death bumps into a seemingly impossible presence.

— Amy Nicholson, Los Angeles Times, 15 Oct. 2026
So in the short term, these employers are arguably making an economically rational decision — but one that may still come at their employees’ expense.

— Dylan Scott, Vox, 15 Oct. 2026

Definition of rational

Adjective

Before expanding cameras into every neighborhood, there are more sensible, actionable solutions.

— Chicago Tribune, Chicago Tribune, 18 Oct. 2026
The California Coastal Act just turned 50, balancing sensible development with conservation and public access.

— Steve Lopez, Los Angeles Times, 17 Oct. 2026

Definition of sensible

Adjective

Brands must increasingly decide how to combine trade fairs, showroom partnerships, existing buyer relationships and direct retail into a coherent sales strategy.

— Yiling Pan, Vogue, 20 Oct. 2026
The technician gets one coherent answer instead of four tools to reconcile by hand, and the plant avoids the downtime that used to depend on one retiring expert’s memory.

— Osman Koc, Forbes.com, 16 Oct. 2026

Definition of coherent

Adjective

Based purely on average revenue per user, a key metric for telecom companies, Jio's discount to Airtel seems justified, but Jio wants to be seen as a tech company and not just a utility player.

— Priyanka Salve, CNBC, 15 Oct. 2026
That is, if the company were to spend at a higher-than-justified level to meet the terms of its agreement with Raoul's office, whether that spending can be passed on to ratepayers will still be subject to the commission's scrutiny.

— Maggie Dougherty, CBS News, 15 Oct. 2026

Definition of justified

Browse Nearby Words

well-fixed

well-founded

well-groomed

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Style

“Well-founded.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/well-founded. Accessed 25 Oct. 2026.

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Synonyms of well-founded

adjective

Example Sentences

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