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

Sholl also notes that the largest station groups may not immediately rush to buy competitors because many of the most logical acquirers are already shouldering a lot of debt.

— Cynthia Littleton, Variety, 23 July 2026
At a glance, de-normalizing alcohol consumption seems like a logical next step after cracking down on smoking.

— Tim Brinkhof, Time, 23 July 2026

Definition of logical

Adjective

Just as reasonable public health officials had warned, measles is now finding vulnerable victims across the country.

— Dr. Michael Good, Hartford Courant, 26 July 2026
No reasonable person would argue against providing animals with excellent medical care.

— Marianne Pizzitola, New York Daily News, 25 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

His research now reveals revenge operates like an addiction in the brain, activating craving and reward centers while silencing rational thought.

— Kevin Kruse, Forbes.com, 22 July 2026
The pair’s mysterious interactions in the early chapters give way to a series of parables of doubt and belief, in which a rational character is confronted by an irrational event—and immediately convinced of its absolute truth.

— Robert Rubsam, The Atlantic, 20 July 2026

Definition of rational

Adjective

The pumps are designed with a delicate almond toe, a conservative high-cut vamp, and a sensible heel, measuring around three inches.

— Karla Rodriguez, Footwear News, 24 July 2026
Every notetaker that joins a meeting traces back to a reasonably sensible individual choice to keep a credible set of notes in an endless sea of meetings.

— Amanda Gerut, Fortune, 24 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

The event gives the trip a purpose, which can make the spending feel more justified.

— Jeff Fromm, Forbes.com, 10 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

See all Nearby Words

Cite this Entry

Style

“Well-founded.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/well-founded. Accessed 29 Jul. 2026.

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Synonyms of well-founded

adjective

Example Sentences

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