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
And the Republicans’ concern is well-founded.
—Douglas E. Schoen, Washington Post, 1 Apr. 2026
That skepticism is well-founded.
—Luis Peralta, Forbes.com, 27 Mar. 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
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
R. Eric Thomas, Chicago Tribune, 18 Apr. 2026
The guidance to assume compromise is well-founded.
—Dan Goodin, ArsTechnica, 3 Apr. 2026
And the Republicans’ concern is well-founded.
—Douglas E. Schoen, Washington Post, 1 Apr. 2026
That skepticism is well-founded.
—Luis Peralta, Forbes.com, 27 Mar. 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
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
Recent Examples of Synonyms for well-founded
Adjective
-
Thus, if here is any short-term rotation out of technology after its historic rally, financials could become a logical area for investors to revisit.—
Frank Cappelleri,
CNBC,
6 May 2026
-
Each one takes just as much computing work as the last one, regardless of whether the token is just a filler word in an output or a key piece of information in a complex logical problem.—
ArsTechnica,
ArsTechnica,
6 May 2026
Adjective
-
The ten-course meal costs a hundred and forty dollars per person, which is not exactly sofa-cushion change but does feel reasonable given that such high-flying pastry is normally available only at the end of ultra-ritzy meals of considerably higher expense.—
Helen Rosner,
New Yorker,
10 May 2026
-
Finding the perfect venue to have a ring, a backstage area, paying fees and setting a reasonable ticket price are all things that have to be considered.—
Ryan Gaydos,
FOXNews.com,
8 May 2026
Adjective
-
The vulnerability allowed attackers to bypass two-factor authentication protections after obtaining valid login credentials.—
Neetika Walter,
Interesting Engineering,
12 May 2026
-
Presenting a utility bill as a valid form of identification at a voting precinct in West Virginia has gone the way of the tavern polling place and the punch-card ballot.—
John Raby,
Los Angeles Times,
12 May 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
-
All religions are about that kind of magical thinking that goes beyond the rational.—
Stuart Miller,
Oc Register,
7 May 2026
-
The problem with being reduced to playoff bystander is the danger of getting caught up in possibilities lost, at a time when rational thought about realistic possibilities is paramount.—
Ira Winderman,
Sun Sentinel,
4 May 2026
Adjective
-
Their mother is obsessed with marrying all the girls off, but has seemingly decided that bookish, sensible Mary isn’t worth the energy.—
Kate Erbland,
IndieWire,
6 May 2026
-
Our self-interest has usually been of the sensible sort.—
Sun Sentinel Editorial Board,
Sun Sentinel,
1 May 2026
Adjective
-
Organizing that chaos into a coherent blockbuster format is a key part of the assignment here.—
Alison Foreman,
IndieWire,
6 May 2026
-
What is new, and what may have been the draw for those just tuning in, is a sense the race is finally taking a coherent shape, with Xavier Becerra unexpectedly emerging as the candidate to beat.—
Gustavo Arellano,
Los Angeles Times,
6 May 2026
Adjective
-
There are checks that aren’t being processed in a timely fashion, constituents have sued the TTC office after being assessed egregious fines that weren’t justified, and phone wait times are over two hours.—
Lucas Robinson,
San Diego Union-Tribune,
8 May 2026
-
Now we’re told this is all justified.—
Daryl Campbell,
Sun Sentinel,
6 May 2026
Cite this Entry
“Well-founded.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/well-founded. Accessed 13 May. 2026.
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