1
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
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Antonyms & Near Antonyms
2
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
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Recent Examples of well-founded
These fears are well-founded, as authorities have previously executed many protesters following grossly unfair trials, while many others remain on death row.
—
Hamid Kashani, Twin Cities, 5 Feb. 2026
His concern now seems well-founded.
—Chris Murphy, Vanity Fair, 29 Jan. 2026
The concerns are well-founded: Higher speeds increase the risk to pedestrians and cyclists in particular.
—Ariane Lange, Sacbee.com, 21 Dec. 2025
In the settlement agreement, Ceratizit neither admits liability nor concedes that the government’s claims are well-founded.
—Desiree Mathurin
december 19, Charlotte Observer, 19 Dec. 2025
And that uncertainty may be well-founded, because according to The Athletic national baseball writer and former MLB general manager Jim Bowden, there's another All-Star second baseman in the division who could make sense for New York.
—Jon Vankin, MSNBC Newsweek, 26 Oct. 2025
That fear was probably well-founded.
—Ryan Whitwam, ArsTechnica, 5 Sep. 2025
One of these targets was to define a sound and well-founded strategy for Calik Denim to become a carbon-neutral company.
—Angela Velasquez, Sourcing Journal, 28 Aug. 2025
That confidence proved well-founded.
—Clayton Davis, Variety, 13 Aug. 2025
Hamid Kashani, Twin Cities, 5 Feb. 2026
His concern now seems well-founded.
—Chris Murphy, Vanity Fair, 29 Jan. 2026
The concerns are well-founded: Higher speeds increase the risk to pedestrians and cyclists in particular.
—Ariane Lange, Sacbee.com, 21 Dec. 2025
In the settlement agreement, Ceratizit neither admits liability nor concedes that the government’s claims are well-founded.
—Desiree Mathurin
december 19, Charlotte Observer, 19 Dec. 2025
And that uncertainty may be well-founded, because according to The Athletic national baseball writer and former MLB general manager Jim Bowden, there's another All-Star second baseman in the division who could make sense for New York.
—Jon Vankin, MSNBC Newsweek, 26 Oct. 2025
That fear was probably well-founded.
—Ryan Whitwam, ArsTechnica, 5 Sep. 2025
One of these targets was to define a sound and well-founded strategy for Calik Denim to become a carbon-neutral company.
—Angela Velasquez, Sourcing Journal, 28 Aug. 2025
That confidence proved well-founded.
—Clayton Davis, Variety, 13 Aug. 2025
Recent Examples of Synonyms for well-founded
Adjective
-
Next logical step in electromobility The goal is to advance the use of high-voltage technologies in electric vehicles and define safety standards.—
Prabhat Ranjan Mishra,
Interesting Engineering,
12 Feb. 2026
-
However, Murdaugh’s attorneys have argued this motive did not make logical sense.—
Eric Levenson,
CNN Money,
11 Feb. 2026
Adjective
-
Grand jury proceedings require only probable cause, not proof beyond a reasonable doubt, and are conducted without defense counsel present.—
Kaelan Deese,
The Washington Examiner,
15 Feb. 2026
-
Analysts view the bank's valuation as more reasonable following the pullback.—
Morgan Chittum,
CNBC,
14 Feb. 2026
Adjective
-
The PhD student, originally from Turkey and on a valid F-1 student visa, was shuttled through multiple states following her arrest and suffered a series of asthma attacks without adequate medical care, according to her attorneys.—
Danya Gainor,
CNN Money,
10 Feb. 2026
-
If multiple hypotheses work to explain the data equally well but one conflicts with reality in some other realm (and the other doesn’t), the one that’s valid across the widest range of applicability is superior.—
Big Think,
Big Think,
10 Feb. 2026
Adjective
-
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
-
The ledger is the foundation of reasoned conclusion.—
Big Think,
Big Think,
5 Nov. 2025
Adjective
-
Perardi tried to stay rational.—
Matthew Bremner,
Rolling Stone,
11 Feb. 2026
-
This disconnect between individual choice and individual benefit represents not merely an economic inefficiency but a philosophical failure to respect the rational agency of health care consumers.—
Jared Rhoads,
STAT,
10 Feb. 2026
Adjective
-
The United States, of course, not the Cuban people, who may suffer another 66 years unless sensible commentators push back.—
Chicago Tribune,
Chicago Tribune,
11 Feb. 2026
-
Judges could find the NCAA’s exclusion of players who signed NBA contracts sensible considering that college sports are typically played by degree-seeking students who ordinarily spend four or five years in school and then move on to another phase of life, usually a job or grad school.—
Michael McCann,
Sportico.com,
10 Feb. 2026
Adjective
-
The two new buildings have cozy rooms and verandas that are open and breezy, but coherent with the larger property.—
Condé Nast,
Condé Nast Traveler,
9 Feb. 2026
-
Witnesses said Blanco appeared to not be coherent.—
Andrew Ramos,
CBS News,
7 Feb. 2026
Adjective
-
Sweet Venus enters your thoughtful sign, empowering you with justified confidence in your powers of attraction.—
Tarot.com,
Hartford Courant,
10 Feb. 2026
-
The Justice Department did not respond to a request for comment, but officials there have broadly defended the department’s actions as not only justified but necessary for ensuring the rule of law and holding alleged criminals to account.—
Kevin Rector,
Los Angeles Times,
31 Jan. 2026
Cite this Entry
“Well-founded.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/well-founded. Accessed 15 Feb. 2026.
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