UNCERTAINTY Synonyms: 37 Similar and Opposite Words

Q: How does the noun 'uncertainty' differ from other similar words?

Some common synonyms of uncertainty are doubt , dubiety , mistrust , skepticism , and suspicion . While all these words mean "lack of sureness about someone or something," uncertainty may range from a falling short of certainty to an almost complete lack of conviction or knowledge especially about an outcome or result. // assumed the role of manager without hesitation or uncertainty

Q: When could 'doubt' be used to replace 'uncertainty'?

The words doubt and uncertainty are synonyms, but do differ in nuance. Specifically, doubt suggests both uncertainty and inability to make a decision. // plagued by doubts as to what to do

Q: Where would 'dubiety' be a reasonable alternative to 'uncertainty'?

Although the words dubiety and uncertainty have much in common, dubiety stresses a wavering between conclusions. // felt some dubiety about its practicality

Q: When might 'mistrust' be a better fit than 'uncertainty'?

While in some cases nearly identical to uncertainty , mistrust implies a genuine doubt based upon suspicion. // had a great mistrust of doctors

Q: When would 'skepticism' be a good substitute for 'uncertainty'?

While the synonyms skepticism and uncertainty are close in meaning, skepticism implies unwillingness to believe without conclusive evidence. // an economic forecast greeted with skepticism

Q: In what contexts can 'suspicion' take the place of 'uncertainty'?

The synonyms suspicion and uncertainty are sometimes interchangeable, but suspicion stresses lack of faith in the truth, reality, fairness, or reliability of something or someone. // regarded the stranger with suspicion

uncertainty

noun

ˌən-ˈsər-tᵊn-tē

Definition of uncertainty

as in doubt

a feeling or attitude that one does not know the truth, truthfulness, or trustworthiness of someone or something uncertainty about her job prospects has her worried

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How does the noun uncertainty differ from other similar words?

Some common synonyms of uncertainty are doubt, dubiety, mistrust, skepticism, and suspicion. While all these words mean "lack of sureness about someone or something," uncertainty may range from a falling short of certainty to an almost complete lack of conviction or knowledge especially about an outcome or result.

assumed the role of manager without hesitation or uncertainty

When could doubt be used to replace uncertainty?

The words doubt and uncertainty are synonyms, but do differ in nuance. Specifically, doubt suggests both uncertainty and inability to make a decision.

plagued by doubts as to what to do

Where would dubiety be a reasonable alternative to uncertainty?

Although the words dubiety and uncertainty have much in common, dubiety stresses a wavering between conclusions.

felt some dubiety about its practicality

When might mistrust be a better fit than uncertainty?

While in some cases nearly identical to uncertainty, mistrust implies a genuine doubt based upon suspicion.

had a great mistrust of doctors

When would skepticism be a good substitute for uncertainty?

While the synonyms skepticism and uncertainty are close in meaning, skepticism implies unwillingness to believe without conclusive evidence.

an economic forecast greeted with skepticism

In what contexts can suspicion take the place of uncertainty?

The synonyms suspicion and uncertainty are sometimes interchangeable, but suspicion stresses lack of faith in the truth, reality, fairness, or reliability of something or someone.

regarded the stranger with suspicion

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 uncertainty Treatments can include behavioral experiments that safely expose people to uncertainty. — ABC News, 17 Oct. 2026 The researchers acknowledged limitations such as the absence of eye-movement recordings during scanning and uncertainty. — Maria Mocerino, Interesting Engineering, 17 Oct. 2026 Shipping through the Strait of Hormuz remains dangerous and constrained, prolonging uncertainty over oil supplies and fuel prices. — Cathy Bussewitz, Chicago Tribune, 17 Oct. 2026 Daisy Edgar-Jones and Esmé Creed-Miles star in the latest adaptation as sisters Elinor and Marianne Dashwood, who navigate love, loss and financial uncertainty as they are forced to leave their family estate in Sussex. — Payton Turkeltaub, Variety, 17 Oct. 2026 See All Example Sentences for uncertainty

Recent Examples of Synonyms for uncertainty

Noun

Complicating things is the current Administration, which has mastered the art of using those message-delivery systems to spread doubt and discontent and suspicion.

— Deborah Treisman, New Yorker, 18 Oct. 2026
Beset with doubts and periods of blockage, Krasner had to find constantly ways to move on and pursue a trajectory that was all her own, all while facing Pollock’s larger-than-life.

— John Yau, ARTnews.com, 18 Oct. 2026

Definition of doubt

Noun

Of the 13 most competitive Senate races, seven Republicans have expressed skepticism or outright opposition to the agreement that is unlikely to significantly affect high diesel costs contributing to broader inflation.

— Ramsey Touchberry, The Washington Examiner, 15 Oct. 2026
Leaning into many voters’ skepticism of artificial intelligence and data centers, Biss has also put forward a multipart plan to regulate the industry.

— Olivia Olander, Chicago Tribune, 14 Oct. 2026

Definition of skepticism

Noun

On Tuesday, Berkeley police investigators arrested Ayubi in El Cerrito for suspicion of two counts of felony hit-and-run.

— Carlos E. Castañeda, CBS News, 14 Oct. 2026
Searches of the data must be for law enforcement purposes only and there must be reasonable suspicion of criminal activity, the policy states.

— Kendrick Calfee, Kansas City Star, 14 Oct. 2026

Definition of suspicion

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uncertainties

uncertainty

unchain

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“Uncertainty.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/uncertainty. Accessed 21 Oct. 2026.

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Synonyms of uncertainty

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