DOUBTFUL Synonyms: 144 Similar and Opposite Words

Q: How does the adjective 'doubtful' contrast with its synonyms?

Some common synonyms of doubtful are dubious , problematic , and questionable . While all these words mean "not affording assurance of the worth, soundness, or certainty of something," doubtful implies little more than a lack of conviction or certainty. // doubtful about whether I said the right thing

Q: When is 'dubious' a more appropriate choice than 'doubtful'?

The words dubious and doubtful are synonyms, but do differ in nuance. Specifically, dubious stresses suspicion, mistrust, or hesitation. // dubious about the practicality of the scheme

Q: When is it sensible to use 'problematic' instead of 'doubtful'?

While the synonyms problematic and doubtful are close in meaning, problematic applies especially to things whose existence, meaning, fulfillment, or realization is highly uncertain. // whether the project will ever be finished is problematic

Q: When would 'questionable' be a good substitute for 'doubtful'?

While in some cases nearly identical to doubtful , questionable may imply no more than the existence of doubt but usually suggests that the suspicions are well-grounded. // a man of questionable honesty

doubtful

adjective

ˈdau̇t-fəl

Definition of doubtful

as in unsure

not feeling sure about the truth, wisdom, or trustworthiness of someone or something he was doubtful about the decision to complete the project despite its mounting problems

Synonyms & Similar Words

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Antonyms & Near Antonyms

as in questionable

giving good reason for being doubted, questioned, or challenged the election results were highly doubtful, so an investigation was begun

Synonyms & Similar Words

Antonyms & Near Antonyms

as in unlikely

not likely to be true or to occur our winning the championship increasingly looks like a doubtful outcome

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Antonyms & Near Antonyms

as in disputable

open to question or dispute a doubtful claim to the property

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Antonyms & Near Antonyms

Synonym Chooser

How does the adjective doubtful contrast with its synonyms?

Some common synonyms of doubtful are dubious, problematic, and questionable. While all these words mean "not affording assurance of the worth, soundness, or certainty of something," doubtful implies little more than a lack of conviction or certainty.

doubtful about whether I said the right thing

When is dubious a more appropriate choice than doubtful?

The words dubious and doubtful are synonyms, but do differ in nuance. Specifically, dubious stresses suspicion, mistrust, or hesitation.

dubious about the practicality of the scheme

When is it sensible to use problematic instead of doubtful?

While the synonyms problematic and doubtful are close in meaning, problematic applies especially to things whose existence, meaning, fulfillment, or realization is highly uncertain.

whether the project will ever be finished is problematic

When would questionable be a good substitute for doubtful?

While in some cases nearly identical to doubtful, questionable may imply no more than the existence of doubt but usually suggests that the suspicions are well-grounded.

a man of questionable honesty

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of doubtful Oregon was without starting safety Aaron Flowers, who was listed as doubtful earlier this week with an undisclosed injury. — ABC News, 10 Oct. 2026 Star freshman wide receiver Trent Mosley began the week listed as questionable on the availability report, a step up from his doubtful classification last Wednesday. — Sean Campbell, Los Angeles Times, 1 Oct. 2026 Experts, including Higel, are doubtful that the Iraqi government will be able to disarm the Iran-loyal groups even if war between Iran and the US ends. — Sarah Tamimi, CNN Money, 30 Sep. 2026 Backup quarterback Cole Ballard, who was injured in the Missouri game, is likely to be listed as doubtful at best this week. — Gary Bedore, Kansas City Star, 28 Sep. 2026 See All Example Sentences for doubtful

Recent Examples of Synonyms for doubtful

Adjective

The Salt Lake County clerk requests assistance to secure the polls, but the sheriff, unsure about jurisdiction, declines.

— Barton Gellman, New Yorker, 25 Oct. 2026
The equipment truck had left spring training in Tempe, Arizona, and was in Salt Lake City, unsure where to go, when Selig called traveling secretary Tommy Ferguson, who had held the same job with the Braves.

— ABC News, ABC News, 24 Oct. 2026

Definition of unsure

Adjective

Puka Nacua shined despite entering the game questionable with a calf injury and Kyren Williams and Blake Corum combined for nearly 200 rushing yards.

— Los Angeles Times, Los Angeles Times, 25 Oct. 2026
He was listed as questionable to return as he was examined in the injury tent.

— ABC News, ABC News, 25 Oct. 2026

Definition of questionable

Adjective

Friedman began her remarks by reminding the audience of von Furstenberg’s unlikely beginning, born in Brussels to a Holocaust survivor.

— Ariel Bielsky, Vogue, 24 Oct. 2026
Dahlia Scheindlin, a veteran pollster who works for left-of-center candidates and parties in Israel, speculated that the number of returning overseas voters was unlikely to be big enough to change the outcome of the election.

— Daniel Brook, New Yorker, 24 Oct. 2026

Definition of unlikely

Adjective

But revenue coming in at double the projections is not disputable and cannot happen if the tax base runs away.

— Teresa Ghilarducci, Forbes.com, 23 Aug. 2026
However, disputable refereeing decisions, especially in the matches against Italy and Spain, led to allegations that South Korea may have benefited from favorable officiating.

— Andrew Pereira, Encyclopedia Britannica, 18 June 2026

Definition of disputable

Adjective

Progressives like Melat Kiros have signaled their votes for Jeffries might be up for grabs unless their leadership embraces more left-leaning policies, but most Democrats are skeptical about major defections.

— Nicholas Wu, semafor.com, 27 Oct. 2026
Gabriel, however, is more skeptical, arguing that infrastructure carries the incentives of the model that built it, making a brand with less influence likely to struggle to resist a parent company oriented around speed, efficiency, and growth.

— Jessica Binns, Vogue, 26 Oct. 2026

Definition of skeptical

Adjective

Populated almost entirely by impossibly wealthy characters reveling in penthouse splendor, the Astaire-Rogers movies argued with high style against the proposition that the material and social rewards of wealth were dubious.

— David Hajdu, Vanity Fair, 20 Oct. 2026
If Secretary of Defense Pete Hegseth is to be believed, America will soon gain the dubious distinction of joining the only four countries on the globe that carry out executions in public.

— Lorraine Ali, Los Angeles Times, 10 Oct. 2026

Definition of dubious

Adjective

Whether a 7-inch display is really the ideal way to watch TV is debatable, but for recipes, video calls and background entertainment, the format makes sense.

— New Atlas, New Atlas, 14 Oct. 2026
While the advantages of retinoids like retinol—firmer, clearer, and brighter skin—are essentially fact at this point, what constitutes the best retinoid is a bit more debatable.

— Deanna Pai, Vogue, 7 Oct. 2026

Definition of debatable

Adjective

The authentication process combines human expertise and AI integration to flag any suspicious activity and ensure that listings follow commercial industry standards.

— Sophie Lou Wilson, Vogue, 26 Oct. 2026
What readers are saying The comments discuss a case involving a person who sent letters containing a suspicious substance, with many commenters criticizing the individual's intelligence for including his return address.

— Violet Jira, Washington Post, 26 Oct. 2026

Definition of suspicious

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Style

“Doubtful.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/doubtful. Accessed 28 Oct. 2026.

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Synonyms of doubtful

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