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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
Org/resources/fire-stations How to fill a sandbag Not sure how to fill your sandbags? Southern California Weather Report, Orange County Register, 13 Mar. 2025 Fossilised footprints found at Queensland school | ABC NEWS Watch on Paleontologists aren’t sure which species of dinosaur made the tracks. Sarah Kuta, Smithsonian Magazine, 13 Mar. 2025
Adverb
And sure, his role on Deadpool & Wolverine was mostly played for laughs, but as Evans himself said, never say never. Lissete Lanuza Sáenz, StyleCaster, 13 Feb. 2025 Summer has only just started, but, girl, things sure are already heated. Brian Moylan, Vulture, 12 Feb. 2025 See All Example Sentences for sure
Recent Examples of Synonyms for sure
Adjective
  • The guard is one of the more clutch players in the league so if the game gets tight toward the end, Denver feels confident with Murray on the court.
    Thomas G. Moukawsher, Newsweek, 22 Mar. 2025
  • However, markets are confident that the FOMC will cut interest rates by June 18 giving a 78% chance that interest rates are below their current level of 4.25% to 4.5% by then according to the CME FedWatch Tool.
    Simon Moore, Forbes, 22 Mar. 2025
Adjective
  • Boasberg, however, gave the administration until Thursday at noon to comply or justify withholding the information, stating that his request was necessary to determine if the government deliberately ignored the court's order.
    Hannah Parry, Newsweek, 20 Mar. 2025
  • There’s no need for Tuchel to over-adjust and get England playing in boxy formations and passing in straight lines, as Eriksson and Capello seemed to think was necessary.
    Michael Cox, The Athletic, 20 Mar. 2025
Adjective
  • Proponents in Louisiana and elsewhere had cast the method as humane, painless and reliable – in contrast to lethal injection, for which states in recent years have struggled to secure drugs or faced criticism as executions went awry of official plans.
    Dakin Andone, CNN, 12 Mar. 2025
  • My government will keep our tariffs on until the Americans show us respect—and make credible, reliable commitments to free and fair trade.
    Shane Croucher, Newsweek, 12 Mar. 2025
Adjective
  • Because true wealth isn’t just accumulated—it’s activated.
    Tim Maurer, Forbes, 16 Mar. 2025
  • More than ever before, women feel the freedom to explore and embrace their true desires without fear of societal rejection.
    Mark Davis, Newsweek, 16 Mar. 2025
Adjective
  • Yet as Gee points out, to date, there are still only suppositions, rather than conclusive evidence about why hominins made the transition to a bipedal lifestyle.
    Bruce Dorminey, Forbes, 17 Mar. 2025
  • The agency is quickly becoming a target of Elon Musk, who has claimed without conclusive evidence that there's rampant fraud from improper payments to dead people.
    Emily Peck, Axios, 13 Mar. 2025
Adverb
  • What makes Kylie Jenner's glossy French nails so special and how to recreate them: A pastel pink is definitely one of the spring colors for 2025.
    Lena Raab, Glamour, 16 Mar. 2025
  • Seeing how the professional thing turned out, my following definitely grew.
    Tom Krasovic, San Diego Union-Tribune, 15 Mar. 2025
Adjective
  • State law doesn’t allow health care providers to acquire, replace or add to their facilities and equipment, except in certain circumstances, without approval.
    Chase Jordan, Charlotte Observer, 17 Mar. 2025
  • But Deborah Denno, a law professor at Fordham University, pointed out judges have deemed certain execution methods cruel and unusual punishment in the past.
    N'dea Yancey-Bragg, USA TODAY, 17 Mar. 2025
Adjective
  • But many feel policy change is inevitable, especially given European countries including Malta, Luxembourg, Czechia, Switzerland, the Netherlands and Germany are all moving towards regulation.
    Sarah Sinclair, Forbes, 21 Mar. 2025
  • While upsets are inevitable, only a few teams manage to turn them into deep tournament runs.
    Josh Hammer, Newsweek, 20 Mar. 2025

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Cite this Entry

“Sure.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/sure. Accessed 25 Mar. 2025.

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