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Definition of surenext
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as in reliable
not likely to fail a sure cure for the winter blues—a week in the Bahamas

Synonyms & Similar Words

Antonyms & Near Antonyms

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sure

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adverb

Synonym Chooser

How does the adjective sure contrast with its synonyms?

Some common synonyms of sure are certain, cocksure, and positive. While all these words mean "having no doubt or uncertainty," sure usually stresses the subjective or intuitive feeling of assurance.

felt sure that I had forgotten something

When is certain a more appropriate choice than sure?

In some situations, the words certain and sure are roughly equivalent. However, certain may apply to a basing of a conclusion or conviction on definite grounds or indubitable evidence.

police are certain about the cause of the fire

When would cocksure be a good substitute for sure?

The words cocksure and sure can be used in similar contexts, but cocksure implies presumptuous or careless positiveness.

you're always so cocksure about everything

Where would positive be a reasonable alternative to sure?

The synonyms positive and sure are sometimes interchangeable, but positive intensifies sureness or certainty and may imply opinionated conviction or forceful expression of it.

I'm positive that's the person I saw

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 sure
Adjective
By then, even many of the people in the protest weren’t sure what started it, including the city council member who soon arrived. Tim Sullivan, Fortune, 29 Jan. 2026 Not sure which binoculars are best for you? Anthony Wood, Space.com, 28 Jan. 2026
Adverb
That sure hasn’t hurt the stock. Jim Cramer, CNBC, 25 Jan. 2026 But these sure are Stearns’ Mets now and going forward, for better or worse. Mike Lupica, New York Daily News, 24 Jan. 2026 See All Example Sentences for sure
Recent Examples of Synonyms for sure
Adjective
  • Katharine Blodgett’s delivery is silken, confident.
    Natalia Sánchez Loayza, Scientific American, 29 Jan. 2026
  • The brand works with skin experts to strengthen credibility and help customers feel confident using the device safely and consistently as part of their routine.
    William Jones January 29, Miami Herald, 29 Jan. 2026
Adjective
  • Still, the goal is to make necessary changes before hardship.
    Lisa Eadicicco, CNN Money, 31 Jan. 2026
  • On the company’s earnings call, analysts asked CEO Tim Cook several questions about Apple’s access to memory components, which have seen their prices skyrocket due to demand related to chips necessary for artificial intelligence data centers.
    Kif Leswing, CNBC, 30 Jan. 2026
Adjective
  • This makes vocal communication a reliable way — if not the only way — for dolphins to maintain contact with one another, especially when traveling, hunting or navigating social situations.
    Scott Travers, Forbes.com, 27 Jan. 2026
  • When economic conditions feel unstable, gold is often viewed as a safe and reliable investment.
    Brady Halbleib, CBS News, 27 Jan. 2026
Adjective
  • That speaks of self-protection, not transparency or true accountability for Andrew, who has denied all allegations against him.
    Stephanie Nolasco , Ashley Papa, FOXNews.com, 4 Feb. 2026
  • Mass debranding is also required because, in true FIFA style, only the governing body’s official partners and sponsors can be visually present at the World Cup.
    Phil Hay, New York Times, 3 Feb. 2026
Adjective
  • Florida law makes grand jury proceedings secret, so the silence isn’t conclusive.
    Sun Sentinel Editorial Board, Sun Sentinel, 23 Jan. 2026
  • However, with the stock reaching new peaks and the story well recognized, is this the conclusive phase of a momentum chase or a sustainable revaluation?
    Trefis Team, Forbes.com, 21 Jan. 2026
Adverb
  • And the result is definitely something to behold.
    New Atlas, New Atlas, 31 Jan. 2026
  • Swift has, however, hinted that her guest list will be quite large, and that one of her famous friends will almost definitely perform at the reception.
    Hannah Dailey, Billboard, 30 Jan. 2026
Adjective
  • And Plaschke’s blood-boiling need to make the grand statement way before anything is certain doesn’t prove the Plaschke Curse is alive and well?
    Los Angeles Times, Los Angeles Times, 31 Jan. 2026
  • The outsize role that capital gains — income from certain investments — play in revenue makes the volatility worse.
    Lanhee J. Chen, Mercury News, 31 Jan. 2026
Adjective
  • The dramatic halt may have been inevitable given how far and how fast metal prices had surged over the last year.
    Stan Choe, Los Angeles Times, 30 Jan. 2026
  • For governments, company leaders, investors, and others, the danger of the present lies not in uncertainty itself, but in the demand for overly simple solutions and the paralysis induced by their inevitable failure.
    Scott Montgomery, Forbes.com, 30 Jan. 2026

Browse Nearby Words

Cite this Entry

“Sure.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/sure. Accessed 4 Feb. 2026.

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