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
Relevance
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
The next few weeks will show if that confidence is well-founded.
—
Tim McDonnell, semafor.com, 19 Feb. 2026
Their concern—well-founded—is that college has become an increasingly expensive pathway to success.
—Neetu Arnold, Washington Post, 10 Feb. 2026
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
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
Tim McDonnell, semafor.com, 19 Feb. 2026
Their concern—well-founded—is that college has become an increasingly expensive pathway to success.
—Neetu Arnold, Washington Post, 10 Feb. 2026
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
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
Recent Examples of Synonyms for well-founded
Adjective
-
Taking that kind of approach to free agency is prudent, understandable, logical and probably smart more often than not.—
Parker Gabriel,
Denver Post,
10 Mar. 2026
-
Your 4th House of Family receives support as sensual Venus sextiles unearthing Pluto in your logical 2nd house, nudging you to refresh your routines and polish your living space.—
Tarot.com,
Hartford Courant,
10 Mar. 2026
Adjective
-
If a teammate pushes for an answer, share your requirements and propose a reasonable timeframe that respects both schedules.—
Tarot.com,
New York Daily News,
14 Mar. 2026
-
Jayson Tatum defied reasonable expectations to return from a torn Achilles in under a year and have vaulted the Celtics from fun underdog story to bonafide title contenders.—
Joseph Dycus,
Mercury News,
14 Mar. 2026
Adjective
-
If possible, take some time to journal or meditate (napping would also be valid).—
Tarot.com,
Hartford Courant,
10 Mar. 2026
-
Remember to have your reference number and a valid ID with you.—
Karen Garcia,
Los Angeles Times,
10 Mar. 2026
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
Adjective
-
The business side of football will feel perfectly rational.—
Mike Bianchi,
The Orlando Sentinel,
12 Mar. 2026
-
Austen would have advocated for a more rational and supportive understanding of women’s bodies in health and illness.—
Literary Hub,
Literary Hub,
11 Mar. 2026
Adjective
-
The intuitive Moon squares Saturn, pitting your 3rd House of Distractions against your 6th House of Pragmatism, urging specific words, meticulous timing, and sensible boundaries.—
Tarot.com,
Sun Sentinel,
12 Mar. 2026
-
In this reality, Rebecca Hall wants for some reason to not look like Rebecca Hall, and Evan Peters’s the Beauty–resistant FBI agent Coop is the only sensible man in the world.—
Roxana Hadadi,
Vulture,
10 Mar. 2026
Adjective
-
Structures that are coherent, commercially reasonable, and long-standing tend to withstand examination more effectively than last-minute revisions.—
Ascend Agency,
New York Daily News,
11 Mar. 2026
-
Athens then destroyed Melos and launched the Sicily Expedition with overwhelming force and no coherent theory of governance for what came next.—
Farah N. Jan,
The Conversation,
10 Mar. 2026
Adjective
-
The former mayor also added no local government had done more than the city of Sacramento to address homelessness, though residents’ frustration is absolutely justified.—
Ishani Desai,
Sacbee.com,
12 Mar. 2026
-
Once an investigation is complete, findings are typically forwarded to a district attorney, who determines whether the officer’s actions meet Oklahoma’s legal standard for justified use of deadly force.—
Stephen Martin,
Oklahoma Watch,
5 Mar. 2026
Cite this Entry
“Well-founded.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/well-founded. Accessed 16 Mar. 2026.
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