as in fraud
one who makes false claims of identity or expertise
don't bother to see that guy, as I've heard he's a quack with no actual training
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Antonyms & Near Antonyms
Example Sentences
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Recent Examples of quack
Medallion’s Derek Lo figures that his software can cut through the system’s redundancies, slashing the time and cost of paperwork designed to prevent quacks from practicing medicine and safeguard patients that’s spiraled into something burdensome.
—
Amy Feldman, Forbes.com, 20 Aug. 2025
Tell that to the kids who have been hospitalized and died from measles, following quack Dr. Bobby’s Rx to avoid the shots.
—New York Daily News Editorial Board, New York Daily News, 29 May 2025
And this is why hydropathy was not like many of the other quack medical therapies of the not-quite-modern era.
—John Jeremiah Sullivan, Harpers Magazine, 29 Apr. 2025
There couldn’t a worse choice for the CDC at a time when vaccinations are already being discouraged by such quacks as Florida Surgeon General Joseph Ladapo, who also opposes fluoridation.
—Sun Sentinel Editorial Board, Sun Sentinel, 9 Dec. 2024
See All Example Sentences for quack
Amy Feldman, Forbes.com, 20 Aug. 2025
Tell that to the kids who have been hospitalized and died from measles, following quack Dr. Bobby’s Rx to avoid the shots.
—New York Daily News Editorial Board, New York Daily News, 29 May 2025
And this is why hydropathy was not like many of the other quack medical therapies of the not-quite-modern era.
—John Jeremiah Sullivan, Harpers Magazine, 29 Apr. 2025
There couldn’t a worse choice for the CDC at a time when vaccinations are already being discouraged by such quacks as Florida Surgeon General Joseph Ladapo, who also opposes fluoridation.
—Sun Sentinel Editorial Board, Sun Sentinel, 9 Dec. 2024
See All Example Sentences for quack
Recent Examples of Synonyms for quack
Noun
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The appeals court that ordered a trial court to reconsider Peters' sentence said the trial judge's consideration of her belief in the existence of 2020 election fraud went beyond what was relevant to sentencing her.—
Aysha Bagchi,
USA Today,
16 May 2026
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Dana Williamson, former top aide to Newsom, pleaded guilty in an FBI corruption probe to bank fraud, filing a false tax return and lying to the FBI.—
Sacbee.com,
Sacbee.com,
15 May 2026
Noun
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Some of the most damaging fakes get through because nobody on the defense side knew to challenge them.—
Lars Daniel,
Forbes.com,
14 May 2026
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Once word got out about the reports in Ohio, so did the obvious fakes.—
Andy Rose,
CNN Money,
8 May 2026
Noun
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The three-piece set includes two 20x26-inch matching pillow shams.—
Stephanie Osmanski,
Better Homes & Gardens,
9 May 2026
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Then snap up this pretty seersucker comforter set that includes two pillow shams and sheets (and comes in 30 colors) for just $37.—
Madeline Merinuk,
PEOPLE,
9 May 2026
Noun
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Then give the land back, you pompous charlatans.—
Joe Soucheray,
Twin Cities,
2 May 2026
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To this day, a portion of the left-wing Democratic elite views Obama as a charlatan who hoodwinked their voters into supporting him.—
Ben Smith,
semafor.com,
28 Apr. 2026
Noun
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Now, hardship seems to be an end in itself, a battle scar or badge of honor that distinguishes true backpackers from mere pretenders.—
Tim Brinkhof,
Time,
4 May 2026
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This is where hype turns into hard numbers, and contenders start getting separated from pretenders.—
Geoff Clark OutKick,
FOXNews.com,
25 Apr. 2026
Noun
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Good afternoon and welcome to Con Con, the convention for swindlers, mountebanks, and the people who love them.—
Henry Alford,
New Yorker,
1 Dec. 2025
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Godard might have come across as a species of poseur – a pretentious, quote-spouting mountebank – but his way of seeing was genuinely new.—
Peter Rainer,
Christian Science Monitor,
13 Nov. 2025
Noun
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To tell the truly venomous from the fakers, there are a couple details to help distinguish the two.—
Kirsten Fiscus,
Nashville Tennessean,
17 Sep. 2025
Noun
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The actors are perfectly cast, starting with Marmaï’s likable Antoine, the only player here not being the deceiver.—
Pete Hammond,
Deadline,
12 May 2026
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The film tells the true and twisted tale of a deceiver of land and folk, who, defying her birth as a woman, comported herself as a man and committed many a wicked deed.—
Leo Barraclough,
Variety,
20 Jan. 2026
Cite this Entry
“Quack.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/quack. Accessed 21 May. 2026.
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