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
Your confusion and hurt are well-founded.
—
R. Eric Thomas, Chicago Tribune, 18 Apr. 2026
The guidance to assume compromise is well-founded.
—Dan Goodin, ArsTechnica, 3 Apr. 2026
That certainty proved well-founded.
—Hanna Wickes, Kansas City Star, 16 Mar. 2026
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
R. Eric Thomas, Chicago Tribune, 18 Apr. 2026
The guidance to assume compromise is well-founded.
—Dan Goodin, ArsTechnica, 3 Apr. 2026
That certainty proved well-founded.
—Hanna Wickes, Kansas City Star, 16 Mar. 2026
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
Recent Examples of Synonyms for well-founded
Adjective
-
The logical stop would be Torrey Pines in San Diego, which checks the West Coast and great weather boxes, but the venue is also looking for a new sponsor, as its deal with Farmers Insurance ended in 2026.—
Mark Harris,
FOXNews.com,
21 Apr. 2026
-
Delane gains steam LSU cornerback Mansoor Delane, who visited the Dolphins last week and has repeatedly been linked to Miami at 11, would be a logical pick.—
Barry Jackson,
Miami Herald,
20 Apr. 2026
Adjective
-
With a reasonable chance that both sides win all their remaining games, the size of each victory matters.—
Mark Carey,
New York Times,
25 Apr. 2026
-
Although executors may be paid reasonable compensation—often up to 5% of the estate’s value—you aren’t required to accept the role.—
Nancy Ashburn,
Encyclopedia Britannica,
24 Apr. 2026
Adjective
-
In California, the Los Angeles County Counsel is probing allegations that State Farm delayed, underpaid and denied valid insurance claims from last year's wildfires.—
Michael Copley,
NPR,
28 Apr. 2026
-
Twin Metals filed a federal lawsuit seeking a declaration that the leases are still valid but a judge threw the case out in 2023.—
Todd Richmond,
Los Angeles Times,
28 Apr. 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
-
Knowledge is not understood as the product of an objective and rational analysis of reality, but as the result of an intersubjective negotiation process.—
Florian Wintterlin,
Encyclopedia Britannica,
23 Apr. 2026
-
No rational argument could convince them otherwise.—
Nataliya Gumenyuk,
The Dial,
21 Apr. 2026
Adjective
-
Beets and garlic have similar care requirements, so keeping them together in the garden is not only easy but sensible.—
Lauren Landers,
Better Homes & Gardens,
21 Apr. 2026
-
So using his two top 10 picks on a defensive standout and an offensive lineman feels like a sensible approach.—
Pat Leonard,
New York Daily News,
21 Apr. 2026
Adjective
-
In this ultra-cold, coherent state, the atoms are expected to undergo radioactive decay in sync rather than randomly.—
Prabhat Ranjan Mishra,
Interesting Engineering,
20 Apr. 2026
-
Some security experts say Harakat Ashab al-Yamin al-Islamia is likely a flag of convenience rather than a coherent group, and its claims should be treated with caution.—
ABC News,
ABC News,
19 Apr. 2026
Adjective
-
The justified issue with this latest Cowboys-Arlington deal Ross did not return a call to the Star-Telegram.—
Fort Worth Star-Telegram,
Fort Worth Star-Telegram,
24 Apr. 2026
-
But the federal monitor in place since that ruling has repeatedly said that even when officers conduct a legally justified stop, the subsequent frisk or more invasive search is too often not justified.—
Rocco Parascandola,
New York Daily News,
19 Apr. 2026
Cite this Entry
“Well-founded.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/well-founded. Accessed 29 Apr. 2026.
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