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 Admirers viewed him as a capable leader who could steer the nation through global uncertainties, an image carefully crafted by the mainstream media. — Jovana Gec, Los Angeles Times, 25 Oct. 2026 The midterm elections, a source of market uncertainty, are also less than 10 days away. — Kevin Stankiewicz,zev Fima, CNBC, 25 Oct. 2026 The over has a case, but uncertainty about the Giants’ contribution kept it off my card. — Dan Zaksheske Outkick, FOXNews.com, 25 Oct. 2026 While the past doesn’t predict future performance, selling in times of uncertainty can be a gamble. — Marco Quiroz-Gutierrez, Fortune, 24 Oct. 2026 See All Example Sentences for uncertainty

Recent Examples of Synonyms for uncertainty

Noun

Election deniers are using public records to sow doubt in California.

— Andrew J. Campa, Los Angeles Times, 25 Oct. 2026
Those fiscal strains come as political volatility and social unrest raise doubts about the government’s ability to deliver measures aimed at stabilizing the public finances.

— Jenni Reid,Chloe Taylor, CNBC, 23 Oct. 2026

Definition of doubt

Noun

Further down, The 7 covers a new poll showing Americans’ skepticism of AI.

— Jamie Ross, Washington Post, 21 Oct. 2026
Targeting a smaller raise could protect a higher valuation, but might trigger skepticism over how the AI firm will fund its massive infrastructure needs in a volatile bond market.

— Justin Zacks, CNBC, 21 Oct. 2026

Definition of skepticism

Noun

Given that the dynamic between Europe and Russia is now characterized by pervasive mutual suspicion, conspiracy theories, and expectations of war, there is a growing danger of inadvertent escalation.

— Dmitry Adamsky, Foreign Affairs, 21 Oct. 2026
Anxiety and suspicion about robot infiltrators are everywhere — and so are people claiming to hunt the robots down.

— T.M. Brown, CNN Money, 21 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 28 Oct. 2026.

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