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

Now five decades in the business, the company framed the launch as the next logical step for a brand with products that are built to last and to be passed on between friends, families, and now shoppers.

— Roy Stephen Canivel, Footwear News, 30 Sep. 2026
Eight of the trophies the club won under Mansour came during the years under investigation, so handing them over to the teams that finished behind City while following the rules seems like a logical solution.

— Kevin Baxter, Los Angeles Times, 29 Sep. 2026

Definition of logical

Adjective

Our responsibility is to provide accurate medical information, compassionate counseling and the full range of medically reasonable options so patients can make informed decisions consistent with their values.

— Arkansas Online, Arkansas Online, 3 Oct. 2026
North Carolina has embraced pro-economic growth policies, like lower taxes and reasonable regulations.

— Mary Ramsey, Charlotte Observer, 2 Oct. 2026

Definition of reasonable

Adjective

Indeed, there can be valid reasons for high-net-worth individuals and families to do a Section 351 exchange, said Joshua Norman, principal in the Bardstown, Kentucky, office of Cerity Partners.

— Cheryl Winokur Munk, CNBC, 2 Oct. 2026
To win the presidency in the first round, a candidate must receive more than half of the valid votes cast, excluding blank and null ballots.

— Katie Angell Britannica Editors Oct. 2, Encyclopedia Britannica, 1 Oct. 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

Humans, in contrast, have souls that are additionally capable of rational thought.

— Encyclopedia Britannica, Encyclopedia Britannica, 30 Sep. 2026
Investing more heavily in technology, shifting resources to a newer product line or exiting an activity with poor long-term economics are rational decisions.

— Erik Clarke, Forbes.com, 29 Sep. 2026

Definition of rational

Adjective

Recovery, when it’s required, is faster and more coherent because all stakeholders are working from the same operational picture.

— Abha Dogra, Forbes.com, 29 Sep. 2026
By entangling 30 logical qubits in a single, coherent quantum state, Infleqtion has validated the core architecture of its Sqale hardware and Superstaq software, on its roadmap to deliver 100 logical qubits by 2028.

— Prabhat Ranjan Mishra, Interesting Engineering, 25 Sep. 2026

Definition of coherent

Adjective

The menu is no phonebook, and what has made the cut is well-justified.

— Kat Chen, Condé Nast Traveler, 21 Sep. 2026
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

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 4 Oct. 2026.

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Synonyms of well-founded

adjective

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