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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
Those won't filter the air for you, but they sure as hell will protect your noggin in the event of a crash. Abhimanyu Ghoshal, New Atlas, 22 July 2025 Products That Fit the Bill The surest ways to get a safe mattress are to stick with reputable domestic brands and consider an organic mattress. Julia Forbes, Wired News, 22 July 2025
Adverb
And sure, your patio furniture set is important, but a little decor goes a long way to make an outdoor space more personal and cozy. Blake Bakkila, Architectural Digest, 11 July 2025 Roman Anthony, the hot kid for the Red Sox, sure is fun to watch. Mike Lupica, New York Daily News, 5 July 2025 See All Example Sentences for sure
Recent Examples of Synonyms for sure
Adjective
  • Experts are over 14 times more likely than light users to apply AI across all three phases and are twice as confident in the quality of their output.
    Ron Schmelzer, Forbes.com, 20 July 2025
  • While there are some things for the Lions to overcome this season, Newton is confident in their ability to do so.
    Evan Massey, MSNBC Newsweek, 19 July 2025
Adjective
  • The data needs to be accessible and running in sync across necessary components within the system, not operating in a silo.
    Lori Schafer, Forbes.com, 16 July 2025
  • The Trump administration argued the deployment was necessary to deal with chaotic protests against Immigration and Customs Enforcement arrests.
    July 15, CBS News, 15 July 2025
Adjective
  • By the time Osbourne returned to Milwaukee for a March 5, 1984, concert at the Arena, his concerts had a reliable opening act: protesters outside the venue, criticizing Osbourne and rockers like him for performing the devil's music.
    Chris Foran, jsonline.com, 23 July 2025
  • One of his key issues remains securing clean, reliable water supplies for rural and tribal communities in need.
    Arlyssa D. Becenti, AZCentral.com, 23 July 2025
Adjective
  • This was certainly true of the Mets last summer when Taylor played his way into the lineup more consistently than Harrison Bader.
    Abbey Mastracco, New York Daily News, 26 July 2025
  • This rings especially true for me, a vegetarian for nearly two decades.
    Conçetta Ciarlo, Vogue, 26 July 2025
Adjective
  • The forensic evidence was so conclusive that the case settled for a fraction of the initial demand, saving millions in potential damages.
    Lars Daniel, Forbes.com, 14 July 2025
  • So Professor Thackeray, being a smart and thorough scientist, decided to obtain conclusive proof.
    Sam Kelly July 8, Literary Hub, 8 July 2025
Adverb
  • That’s not to say the 128 GB option is definitely gone—perhaps these will be available only through the Google Store, region-locked, or as network exclusives.
    Ewan Spence, Forbes.com, 26 July 2025
  • The repercussions of that are definitely going to play out in season 8.
    Maureen Lee Lenker Published, EW.com, 25 July 2025
Adjective
  • Keep in mind that buckwheat can cause allergic reactions in certain people (especially in Asian countries), particularly if eaten frequently or in large amounts.
    Caroline Tien, SELF, 15 July 2025
  • A number of Republicans that represent states with rural communities -- such as Sens. Lisa Murkowski of Alaska and Mike Rounds of South Dakota -- have expressed concerns about cuts to public broadcasting that could affect the ability of certain communities to access emergency alerts.
    Allison Pecorin, ABC News, 14 July 2025
Adjective
  • Millions of Americans hit the beach each year, and with that many people, some bad behavior is inevitable.
    Stacey Leasca, Travel + Leisure, 18 July 2025
  • Schiller argues this week's votes were inevitable and that NPR leaders should have prepared for this action by walking away from the funds long ago.
    David Folkenflik, NPR, 18 July 2025

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Cite this Entry

“Sure.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/sure. Accessed 29 Jul. 2025.

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