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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
True, as compared with Trump’s negotiations with Vladimir Putin, for sure. The Editorial Board, Chicago Tribune, 15 Aug. 2025 Many people want to help during or after a disaster but aren’t sure how. Letters To The Editor, The Orlando Sentinel, 15 Aug. 2025
Adverb
So sure, hop into season 3 now, or just wait a month until Netflix scoops it up. Paul Tassi, Forbes.com, 12 July 2025 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 See All Example Sentences for sure
Recent Examples of Synonyms for sure
Adjective
  • Willy Adames is confident the Giants could’ve turned two.
    Justice delos Santos, Mercury News, 13 Aug. 2025
  • So here’s what the data is saying: Corporations are confident—just look at buybacks.
    Frank Holmes, Forbes.com, 13 Aug. 2025
Adjective
  • Many people in the country have a distrust of civil servants; however, civil servants with deep understanding of finance and investing are exactly the type of people who would be necessary.
    Erik Sherman, Forbes.com, 8 Aug. 2025
  • How much rehearsal was necessary for the three children to deliver the complex Don DeLillo text, and for Moon to prepare for her long opening monologue?
    Annika Pham, Variety, 8 Aug. 2025
Adjective
  • Invest in acoustic privacy, reliable technology for hybrid collaboration, and layout choices that reflect different work styles.
    Gleb Tsipursky, The Orlando Sentinel, 15 Aug. 2025
  • If unwilling to meet Crystal Palace’s asking price for reliable enforcer Marc Guéhi—also a possible addition—Liverpool will be counting on the 18-year-old to step up as early as this season.
    Henry Flynn, Forbes.com, 15 Aug. 2025
Adjective
  • While some characters like Connie and Bobby literally grow, true to the show’s comedic approach, King of the Hill’s return underscores how whether in real or animated life, some people never change.
    Abbey White, HollywoodReporter, 7 Aug. 2025
  • The Gilded Age has been a true word-of-mouth phenomenon.
    Katie Campione, Deadline, 7 Aug. 2025
Adjective
  • But to date, there is no conclusive evidence that RL endows LLMs with reasoning capabilities that generalize beyond easily verifiable domains like math and coding.
    Rob Toews, Forbes.com, 10 Aug. 2025
  • Typically, dermatologists aren’t huge fans of using supplements to boost collagen stores, because there’s no conclusive evidence to show that collagen peptides actually make their way to the skin.
    Hannah Coates, Vogue, 5 Aug. 2025
Adverb
  • With so much passion behind the project, Rado’s Press is definitely off to a great start.
    Clea Haran, Parents, 7 Aug. 2025
  • And if not, then that is definitely a worthwhile question (and perhaps a future column).
    Miriam Kirmayer, SELF, 6 Aug. 2025
Adjective
  • Robinhood stock benefits from positive momentum, with impressive recent growth and margins, though certain risks are potential considerations for investors.
    Trefis Team, Forbes.com, 7 Aug. 2025
  • The company’s vision: a system that lets drivers take Zoom calls while the vehicle does the driving—that is, once Level 3 vehicle autonomy is reached and cars can reliably drive themselves under certain conditions.
    IEEE Spectrum, IEEE Spectrum, 7 Aug. 2025
Adjective
  • Many assume that memory loss and cognitive decline are an inevitable part of aging — but new research suggests that doesn’t have to be the case.
    Melissa Rudy, FOXNews.com, 12 Aug. 2025
  • In his meeting with Trump, Putin – potentially seeking to secure at the negotiating table what Russia has not been able to win by force – will be at pains to give the impression that Russia’s advance in Donetsk is inevitable.
    Nick Paton Walsh, CNN Money, 12 Aug. 2025

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Cite this Entry

“Sure.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/sure. Accessed 20 Aug. 2025.

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