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 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 The guidance to assume compromise is well-founded. — Dan Goodin, ArsTechnica, 3 Apr. 2026 See All Example Sentences for well-founded

Recent Examples of Synonyms for well-founded

Adjective

More importantly, the researchers found that the effective logical error rate was 10 times lower than the physical error rate.

— Neetika Walter, Interesting Engineering, 30 July 2026
The Cardinals needed an available reliever more than a starter recovering from a 77-pitch appearance, making Dobbins the logical roster casualty despite his otherwise solid work during his first extended opportunity in the major leagues.

— Peter Chawaga, Forbes.com, 29 July 2026

Definition of logical

Adjective

The example demonstrates how an owner might maintain an attractive base rate while making a reasonable margin through relevant extras.

— Jeff Fromm, Forbes.com, 2 Aug. 2026
The three-prospect package going to the Tigers seems like a reasonable price for two months of a pitcher who underwent surgery to remove loose bodies in his elbow in May.

— Andy McCullough, New York Times, 2 Aug. 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

If writing a 10-page proposal yields $30,000 in capital faster than closing 50 cold calls, a rational business owner will devote their afternoons to proposal writing.

— AllBusiness, Forbes.com, 1 Aug. 2026
So much for the rational part of an exasperating season that marked the first time since 2014 that the Chiefs failed to make the playoffs.

— Vahe Gregorian July 31, Kansas City Star, 31 July 2026

Definition of rational

Adjective

Most sensible observers will recognise that his level of influence sits somewhere in the middle.

— Gregg Evans, New York Times, 31 July 2026
By Season 6, however, Schroeder had evolved into the most sensible person on the Bravo hit, and her love affair with Beau Clark won over the audience’s hearts.

— Marlow Stern, Variety, 30 July 2026

Definition of sensible

Adjective

In these emerging ecosystems, K-12 schools, higher education institutions, employers, workforce development organizations, and community leaders work together to create coherent pathways for students.

— Gennaro Piraino, Forbes.com, 21 July 2026
The proportions look coherent, and the surfaces are aerodynamic without looking experimental.

— ArsTechnica, ArsTechnica, 17 July 2026

Definition of coherent

Adjective

Yet traders will look for commentary and signals on what these companies have to say about their semiconductor purchases — and whether the recent sell-off in chipmaking stocks is justified.

— Fred Imbert, CNBC, 29 July 2026
The event gives the trip a purpose, which can make the spending feel more justified.

— Jeff Fromm, Forbes.com, 10 July 2026

Definition of justified

Browse Nearby Words

well-fixed

well-founded

well-groomed

See all Nearby Words

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Style

“Well-founded.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/well-founded. Accessed 4 Aug. 2026.

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Synonyms of well-founded

adjective

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