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 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 Advertisement Barring Platner bowing out in time—which seems unlikely—Democrats are hunkering down, desperately hoping there aren’t more Platner revelations left to come out before Election Day. — Philip Elliott, Time, 10 June 2026 The opponents’ concerns are well-founded. — Alex Weatherall, Boston Herald, 10 June 2026 Add to that an affordability crisis hitting families’ checkbooks and many businesses’ eager push to utilize artificial intelligence, and workers’ sentiments appear well-founded. — Matt Helmer, Fortune, 23 May 2026 See All Example Sentences for well-founded

Recent Examples of Synonyms for well-founded

Adjective

Morris contributed a logical note to sneaky goings-on, and Lupus made his silent bit seem credible.

— Ed Olmstead, HollywoodReporter, 17 Sep. 2026
These athletes, many of whom are 22 or 23 years old, have logical reasons to extend their collegiate sports careers into their mid-20s or beyond.

— Michael McCann, Sportico.com, 16 Sep. 2026

Definition of logical

Adjective

The defense acknowledged the affair but argued the state had built its case on a theory of motive and would be unable to prove its case beyond a reasonable doubt.

— Holly Yan, CNN Money, 18 Sep. 2026
Twenty-five states have called for a constitutional amendment to restore the ability of Congress and the states to set reasonable limits on money in elections.

— Chicago Tribune, Chicago Tribune, 18 Sep. 2026

Definition of reasonable

Adjective

According to the Department of State, the passport must be valid for at least three months beyond departure, with a blank page available for each stamp.

— Paul Jebara, Condé Nast Traveler, 17 Sep. 2026
Officers stopped a car matching that description on Monday and arrested Sevilla, who was driving with an open container of alcohol and without a valid driver's license, police said.

— Elyssa Kaufman, CBS News, 17 Sep. 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

Hardware or firmware that has already been used and studied in academic or institutional settings can be a sensible place to start, particularly when there is published technical evidence and an experienced user community behind it.

— Aaron Timm, Forbes.com, 15 Sep. 2026
The three writers attempted to balance overall talent with building a sensible basketball team.

— Victor Wembanyama, New York Times, 9 Sep. 2026

Definition of sensible

Adjective

Finance, operations, technology and business leaders may all have reasonable ideas for improvement, but a collection of individual initiatives does not automatically become a coherent turnaround strategy.

— Erik Clarke, Forbes.com, 8 Sep. 2026
Osteopathic medical education intentionally integrates biomedical, clinical, health systems and biomechanical sciences, and concepts aligned with complexity science into a coherent framework for physician formation.

— Torie Bosch, STAT, 5 Sep. 2026

Definition of coherent

Adjective

Muslims can collectively work toward that goal by electing anti-Israel candidates, Spencer explained, so giving zakat in hopes of furthering the Palestinian cause is considered justified.

— Mia Cathell, The Washington Examiner, 20 Sep. 2026
The owner should demonstrate continuing usage, acceptable outcomes, current permissions, understood dependencies and a justified cost-to-operate.

— Akhilesh Sharma, Forbes.com, 16 Sep. 2026

Definition of justified

Browse Nearby Words

well-fixed

well-founded

well-groomed

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“Well-founded.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/well-founded. Accessed 22 Sep. 2026.

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Synonyms of well-founded

adjective

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