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

Considering that deer live by their noses, Woods has a logical theory about why deer are most active at dawn and dusk.

— Alex Robinson, Outdoor Life, 29 Oct. 2026
That track record is why Costco’s move into healthcare is logical, and likely to succeed.

— Jeffrey I. Cole, Fortune, 28 Oct. 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

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
There is, in the cold, rational, and most-of-all humorless heart of Defoe, intimations of a world to come (which is our own).

— Literary Hub, Literary Hub, 28 Oct. 2026

Definition of rational

Adjective

Guests who think an occasional bottle of wine flung on the counter has rendered this custom obsolete should note that any sensible hostess will disagree.

— Judith Martin, Sun Sentinel, 28 Oct. 2026
The most sensible corporate response is neither blind automation nor defensive denial.

— Gleb Tsipursky, Washington Post, 27 Oct. 2026

Definition of sensible

Adjective

Merle Haggard and even Bob Dylan find their essential subject in modernity’s threat to a coherent American mythology.

— Adam Gopnik, New Yorker, 26 Oct. 2026
Brands must increasingly decide how to combine trade fairs, showroom partnerships, existing buyer relationships and direct retail into a coherent sales strategy.

— Yiling Pan, Vogue, 20 Oct. 2026

Definition of coherent

Adjective

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
Crump on Monday pointed out that authorities have yet to release video footage of the encounter to support the attorney general's finding that the shooting was a justified use of force.

— SOPHIE BATES, Arkansas Online, 20 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 31 Oct. 2026.

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Synonyms of well-founded

adjective

Example Sentences

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