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

But there’s something bracingly logical about injecting the synthetic jolt of electronic dance music into a hospital environment, where vulnerable bodies are sustained by machines.

— Emily Nussbaum, New Yorker, 5 Nov. 2026
With 40 percent of its revenue generated by returning customers, Braquet said this focus was the logical next step and the motivation in their ongoing first funding round.

— Lily Templeton, Footwear News, 3 Nov. 2026

Definition of logical

Adjective

Almost all the controls were electronic buttons, and the dashboard was entirely digital—two ideas that sound reasonable today but were nightmarishly complex in the mid-1970s.

— Will Sabel Courtney, Robb Report, 30 Oct. 2026
The gap between the goal and the day becomes so wide that quitting feels reasonable.

— JJ Mazzo, Forbes.com, 30 Oct. 2026

Definition of reasonable

Adjective

Meanwhile, real data infrastructure applies temporal reasoning, asking not just who an entity is, but precisely when that information was valid.

— Filip Popovic, Forbes.com, 30 Oct. 2026
Approximately six employees did not have valid California food handler cards available for review.

— Sacbee.com, Sacbee.com, 30 Oct. 2026

Definition of valid

Adjective

But that won’t keep them from trying, and when people’s passions are aroused, and emotions crowd out reasoned thought, anything can happen.

— Chris Roemer, Baltimore Sun, 21 Oct. 2026
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

Definition of reasoned

Adjective

Kim will face his last days when a large enough body of North Korean elites conclude that remaining loyal is no longer their safest and most rational choice.

— Jieun Baek, Foreign Affairs, 30 Oct. 2026
Predicting the costs How cities full of rational, educated, financially prudent people get sucked in, how we’re persuaded to put aside concerns about being stuck with a massive bill and just surrender to the spectacle.

— Jack Dolan, Los Angeles Times, 29 Oct. 2026

Definition of rational

Adjective

The exhibit will include over 200 pieces that play with the sensible, mundane, and high fashion.

— CT Jones, Rolling Stone, 5 Nov. 2026
The sensible comment might suggest Honeycutt doesn’t care which party or politician follows through with MAHA’s goals, just as long as they’re achieved.

— Beth Mole, ArsTechnica, 5 Nov. 2026

Definition of sensible

Adjective

In the original movie, Edward Woodward plays the cop as a religious family man whose self-righteousness seems more or less justified.

— Jim Hemphill, IndieWire, 30 Oct. 2026
The Mississippi attorney general’s office said its review found the fatal shooting was a justified use of force.

— Jack Brook, Los Angeles Times, 22 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 6 Nov. 2026.

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Synonyms of well-founded

adjective

Example Sentences

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