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

The common thought is that Boris is actually Doctor Strange, the magic-wielder being a logical choice for an appearance alongside Doom (or at least some evil variant of him).

— Paul Tassi, Forbes.com, 10 Aug. 2026
What to See and Do In Duluth The North Shore begins where I-35 ends in Duluth—a city that is a great weekend getaway by itself and a logical spot to spend at least one night before your North Shore Scenic Drive trip.

— Ginger Crichton, Midwest Living, 7 Aug. 2026

Definition of logical

Adjective

What starts as a reasonable desire to prevent disease can escalate into constant testing and rigid routines built around an ever-growing roster of supplements and experimental remedies.

— John Vorwald, Robb Report, 16 Aug. 2026
The argument about competition against girl athletes is a reasonable one, though apparently very limited in number of events and any advantages.

— Chicago Tribune, Chicago Tribune, 16 Aug. 2026

Definition of reasonable

Adjective

The draft ordinance would require landlords to provide a valid reason before evicting a tenant or declining to renew their lease.

— Chicago Tribune, Chicago Tribune, 16 Aug. 2026
Patterson said summertime learning loss is a valid worry, but his proposal doesn’t call for a longer summer or fewer hours in the classroom.

— Matthew Adams, Fort Worth Star-Telegram, 16 Aug. 2026

Definition of valid

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

Gorbachev, still consolidating power, was taking a risk by bucking anti-American hawks back in Moscow and standing with Reagan to join him in officially ruling out nuclear war as a rational instrument of policy.

— Tom Nichols, The Atlantic, 14 Aug. 2026
Three functions, each making the rational local decision, and together producing an outcome that would not have been chosen for the enterprise as a whole.

— Carsten Polenz, Fortune, 13 Aug. 2026

Definition of rational

Adjective

The conversation in Springfield about sensible housing reforms shouldn’t end, but given there’s no time to lose, complementary ideas can help bridge the gap between now and whenever Illinois gets its act together.

— The Editorial Board, Chicago Tribune, 13 Aug. 2026
Governments and school districts also have a role to play by adopting sensible policies and regulations.

— Larry Magid, Mercury News, 13 Aug. 2026

Definition of sensible

Adjective

Different fandoms may debate whether the shots fired there are justified, but Bridgers is kind of taking one at herself here, too, amid all the no-love-lost.

— Chris Willman, Variety, 9 Aug. 2026
Despite the reforms, the NYPD’s federal monitor has repeatedly said that even when officers conduct a legally justified stop, the subsequent frisk or more invasive search is too often not justified.

— Colin Mixson, New York Daily News, 7 Aug. 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 19 Aug. 2026.

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Synonyms of well-founded

adjective

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