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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
Emmy voters sure know how to take a bite of the Apple. Jordan Moreau, Variety, 15 July 2025 So sure, hop into season 3 now, or just wait a month until Netflix scoops it up. Paul Tassi, Forbes.com, 12 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
  • Evacuation Protocol: If evacuation becomes necessary, follow your checklist, wear protective clothing, and leave immediately.
    Amanda Castro, MSNBC Newsweek, 8 Aug. 2025
  • 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
Adjective
  • Also moving across is Alpecin Deceuninck’s Edward Planckaert, known for his one-day and stage racing and being a reliable cog in sprint leadouts.
    Jessica Hopkins, New York Times, 15 Aug. 2025
  • Blackouts have nevertheless become a common occurrence in the country's scorching summers, and shorter power cuts take place almost daily, with many Iraqis depending on private generators for reliable power — while those without that access are left to suffer.
    Natasha Turak, CNBC, 15 Aug. 2025
Adjective
  • Whether that’s actually true or people just like to complain more 21 years after the original’s finale is certainly up for similar debate.
    Toni Fitzgerald, Forbes.com, 20 Aug. 2025
  • Here's a breakdown on what's true, what's relevant and what's being left out of the big picture.
    Juliana Kim, NPR, 19 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
  • One performer who definitely isn’t loving the trend, however, is Reneé Rapp.
    Hannah Dailey, Billboard, 19 Aug. 2025
  • The load times are definitely long, but the game handles beautifully, especially on a Switch 2 Pro pad.
    Ollie Barder, Forbes.com, 19 Aug. 2025
Adjective
  • The panel also specified certain conditions that would fall under an exception for medical emergencies, which Tennessee's law does not include.
    Vivian Jones, The Tennessean, 21 Aug. 2025
  • Fiber availability is limited to certain neighborhoods.
    Roxanne Downer, USA Today, 21 Aug. 2025
Adjective
  • Challenges are inevitable, but transparency and consistent effort can rebuild trust and even strengthen the relationship.
    Expert Panel®, Forbes.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 23 Aug. 2025.

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