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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
Update your emergency kit and be sure to include enough food and water to last for 3 days for each person in your home. Bay Area Weather Report, Mercury News, 25 June 2026 Often, people aren’t sure what to say or how to say it. Vinay Kuruvila, Forbes.com, 25 June 2026
Adverb
In the meantime, those ads sure are stuck in the brains of kids. Jon Lapook, CBS News, 21 June 2026 So sure, stuff hits the cutting room floor. Kate Aurthur, Variety, 17 June 2026 See All Example Sentences for sure
Recent Examples of Synonyms for sure
Adjective
  • Ship traffic first started to pick up over the weekend as shipping companies became more confident that talks between the US and Iran were progressing.
    Vanessa Yurkevich, CNN Money, 26 June 2026
  • Merlin, a 2-year-old duck, has taken the internet by storm, captivating fans with his tiny form-fitting Team Mexico jersey and confident waddle around his home of Mexico City.
    Andrew Greif, NBC news, 26 June 2026
Adjective
  • Ashton's journey from moving bins to cleaning them demonstrates that a complete roadmap isn't necessary; curiosity and taking the next step are crucial.
    Sarah Hernholm, Forbes.com, 27 June 2026
  • This week, investors are looking at the huge sums being spent and questioning whether AI can produce the profits and productivity necessary to make all the investment worth it.
    Alex Veiga, Los Angeles Times, 27 June 2026
Adjective
  • But the systems are only as reliable as their sources, and are prone to misinformation and manipulation.
    Brian Stelter, CNN Money, 23 June 2026
  • Amodei predicts that, over the next five to ten years, AI will achieve, among other things, the reliable prevention and treatment of nearly all natural infectious disease, the elimination of most cancer, the prevention of Alzheimer’s and a doubling of the human lifespan.
    Rob Toews, Forbes.com, 22 June 2026
Adjective
  • From viral Aldi Finds to tried-and-true products shoppers love to tell their friends about, people love the thrill of discovering something new here.
    Gabe Hauari, USA Today, 24 June 2026
  • That rugged access is part of the appeal for buyers seeking a true escape rather than a weekend cabin with neighbors in sight.
    David Caraccio, Sacbee.com, 23 June 2026
Adjective
  • However, a three-judge panel selected for a legal assessment of the findings found that the investigation was not conclusive enough.
    ABC News, ABC News, 19 June 2026
  • Bartošák-Harlow said there's no conclusive evidence of who has and who has not paid a toll in the past, and there wasn't any sort of record, adding that companies should not be paying a toll for passage through an international waterway.
    Tom Bowman, NPR, 17 June 2026
Adverb
  • But the New York Knicks captain and MVP definitely returned the favor in a big way.
    Dave Quinn, PEOPLE, 27 June 2026
  • So the two of you are definitely not hanging up the hat after this?
    Ethan Shanfeld, Variety, 27 June 2026
Adjective
  • The eligibility for the program is broad, but certain patients will not qualify.
    Annika Kim Constantino, CNBC, 28 June 2026
  • Martinez said the land should have never been sold to private developers because it’s included in the California State Lands Commission’s tidelands trust, which says certain land near the ocean must be available for public enjoyment.
    Los Angeles Times, Los Angeles Times, 27 June 2026
Adjective
  • But all of these questions led to the same, inevitable conclusion.
    Christopher Buchanan, Los Angeles Times, 26 June 2026
  • The cruise turns into a disaster – perhaps inevitable with all of these particular personalities on board – potentially spelling a watery doom for all on the trip.
    Kambole Campbell, Variety, 26 June 2026

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Cite this Entry

“Sure.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/sure. Accessed 28 Jun. 2026.

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