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 Many predicted this sort of mission-creep when VAR was in its infancy, and those warnings have proven well-founded. — Graham Scott, New York Times, 22 July 2026 Just make sure that your concerns are well-founded and not based on assumptions or stereotypes. — Sherri Gordon, Parents, 21 July 2026 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 The opponents’ concerns are well-founded. — Alex Weatherall, Boston Herald, 10 June 2026 See All Example Sentences for well-founded

Recent Examples of Synonyms for well-founded

Adjective

Perhaps the squad took his ball-respecting mantra to its logical extreme, seemingly reluctant to sully it by smashing it into the net, with Chelsea recording the biggest xG underperformance in the Premier League during his brief tenure.

— Conor O'Neill, New York Times, 15 Oct. 2026
The rebuttal, though methodical and logical, was little more than a momentary speed bump for the runaway popularity of the psychedelic bread story.

— Jennifer Byrne, Popular Science, 15 Oct. 2026

Definition of logical

Adjective

Everyone is excited for the vacation, except for Shannon and Carmella, who both have valid reasons.

— Louis Peitzman, Vulture, 9 Oct. 2026
The effective date and status listed in the state’s record are the relevant information for determining whether a license is currently valid; RideKC transit may be available as a transportation option while that status is being confirmed.

— Karen Koehler, Kansas City Star, 8 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

Sometimes our rational understanding of life and death bumps into a seemingly impossible presence.

— Amy Nicholson, Los Angeles Times, 15 Oct. 2026
Americans cast English severity as evidence of an old, corrupt political order and imagined their own laws as rational, proportionate and suited to free citizens.

— Maurizio Valsania, The Conversation, 14 Oct. 2026

Definition of rational

Adjective

This is putting certain skills, such as the ability to follow a complex argument, weigh competing views, or develop a coherent point of view, at risk.

— Sam Birchall, Fortune, 13 Oct. 2026
The youth protests have also yet to coalesce into a coherent political alternative.

— ABC News, ABC News, 12 Oct. 2026

Definition of coherent

Adjective

Longer life offsets costs The researchers also examined whether the additional electronics could be economically justified.

— Neetika Walter, Interesting Engineering, 9 Oct. 2026
The teachers union, United Teachers Los Angeles, in a memo to school board members, presented a counter interpretation and said the state team exaggerated the crisis and was implicitly faulting justified wage increases.

— Howard Blume, Los Angeles Times, 6 Oct. 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 16 Oct. 2026.

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Synonyms of well-founded

adjective

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