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 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 Your confusion and hurt are well-founded. — R. Eric Thomas, Chicago Tribune, 18 Apr. 2026 See All Example Sentences for well-founded

Recent Examples of Synonyms for well-founded

Adjective

Kitchenware, pantry staples and cookbook publishers are the logical next category.

— Ashley Lynch, Sacbee.com, 3 Sep. 2026
The handle of the pattern is relatively shallow, so from a trading perspective, placing a stop-loss slightly below its lower boundary near 512 provides a logical way to manage risk.

— Frank Cappelleri, CNBC, 2 Sep. 2026

Definition of logical

Adjective

Taxpayers may qualify for relief due to a good compliance history, reasonable cause, or a statutory exception.

— Jamela Adam, USA Today, 28 Aug. 2026
He’s also pushed to make sure The Gilded Age returned with new seasons as soon as was reasonable (those fancy parties and elaborate sets take time) and is looking to return Game of Thrones spinoff A Knight of the Seven Kingdoms on an annual basis.

— Josef Adalian, Vulture, 28 Aug. 2026

Definition of reasonable

Adjective

Spouses generally inherit a minimum portion of the estate (usually one-third or two-thirds), though the right can be waived in a valid premarital or post marital agreement.

— Bob Carlson, Forbes.com, 28 Aug. 2026
The prosecutor said the number appeared valid but acknowledged the material did not establish an issuance date.

— Antonio María Delgado, Miami Herald, 28 Aug. 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, long after a sensible bedtime, the sun would break through the cloud for the first time that day.

— Holden Frith, TheWeek, 4 Sep. 2026
The return of Gustavo Hamer feels like a sentimental move rather than necessarily a sensible football decision and Loum Tchaouna has changed clubs for the fifth summer in a row, and didn’t particularly convince for Burnley last season.

— Nick Miller, New York Times, 4 Sep. 2026

Definition of sensible

Adjective

What remains particularly valuable is the integration of code, visual standards, accessibility, content and interaction into a coherent model of how an organization behaves.

— Goran Paun, Forbes.com, 1 Sep. 2026
Canada and Mexico will need to make a more coherent and concerted effort to join these campaigns—and the United States will need to work much harder to invite them along.

— Chad P. Bown, Foreign Affairs, 1 Sep. 2026

Definition of coherent

Adjective

Golf equipment powerhouse Callaway ended its partnership with Good Good Golf amid the justified backlash over a video ad for a new Callaway driver that depicts a man aggressively shoving a woman to the ground.

— Greg Cote August 30, Miami Herald, 30 Aug. 2026
Our community carries decades of justified mistrust toward institutions that have not always earned it.

— Chuka Onuh, Chicago Tribune, 20 Aug. 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 6 Sep. 2026.

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Synonyms of well-founded

adjective

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