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 Your confusion and hurt are well-founded. — R. Eric Thomas, Chicago Tribune, 18 Apr. 2026 The guidance to assume compromise is well-founded. — Dan Goodin, ArsTechnica, 3 Apr. 2026 And the Republicans’ concern is well-founded. — Douglas E. Schoen, Washington Post, 1 Apr. 2026 That certainty proved well-founded. — Hanna Wickes, Kansas City Star, 16 Mar. 2026 See All Example Sentences for well-founded

Recent Examples of Synonyms for well-founded

Adjective

And Marte has already experienced professional success in Japan, making a return to NPB a logical next step after his latest setback in North America.

— Peter Chawaga, Forbes.com, 8 July 2026
Taking the idea a step further, the authors took 940 problems from three math benchmark datasets and used an LLM to break down their logical structure into a set of premises and a final question.

— Edd Gent, IEEE Spectrum, 8 July 2026

Definition of logical

Adjective

Part of what’s at work is a reasonable desire to give a party with more than its share of grizzled congressional veterans a jolt of youthful energy.

— The Editorial Board, Chicago Tribune, 5 July 2026
This week prosecutors need only demonstrate that there are reasonable grounds to believe Robinson killed Kirk.

— ABC News, ABC News, 5 July 2026

Definition of reasonable

Adjective

None are credible challengers; Matt Conroy is the more reasoned and moderate of the three.

— The Editorial Board, Chicago Tribune, 11 Feb. 2026
This is a time for cool, calm and reasoned debate, and for legislators to think through the consequences of legislation put forth.

— Bobby Zirkin, Baltimore Sun, 15 Jan. 2026

Definition of reasoned

Adjective

While shocking, the Australian Space Agency said there’s a completely rational, albeit cosmic, explanation.

— Drew Pittock, USA Today, 8 July 2026
But for now, the decline of reading seems to be ushering in a less rational, analytical, and sophisticated mode of thinking.

— Rose Horowitch, The Atlantic, 8 July 2026

Definition of rational

Adjective

That victory led, four years later, to the Coastal Act and creation of the Coastal Commission, whose job was to balance sensible development, habitat protection and conservation, and equitable public access.

— Steve Lopez, Los Angeles Times, 11 July 2026
Doctors need to know enough to have sensible, guiding conversations with their patients about dosage and consumption, among other things.

— Peter Grinspoon, STAT, 9 July 2026

Definition of sensible

Adjective

Broader standardization effort The publication is part of a longer-running AM CoE effort to build a coherent AM standards ecosystem for defense, working alongside MIL-SPEC updates and US Department of War`s AM roadmap activities.

— Aditya Jadhav, Interesting Engineering, 7 July 2026
The result, says Noble, is a focused single driver monitor with a clean, coherent and emotionally direct sound.

— Mark Sparrow, Forbes.com, 7 July 2026

Definition of coherent

Adjective

The goal is to reach justified confidence as fast as possible.

— Expert Panel®, Forbes.com, 1 July 2026
The answers to those questions are ‘not really’ and ‘probably not’, even if there’s justified criticism that Tuchel prioritised physicality, athleticism and versatility over technical quality.

— Liam Tharme, New York Times, 30 June 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 14 Jul. 2026.

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Synonyms of well-founded

adjective

Example Sentences

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