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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
On its current trajectory, the surest promise that generative AI offers is not creating new originators, but massively scaling up the production of derivative art. Sheldon Pearce, NPR, 17 June 2025 Superintendent Yvonne Stokes said the district still isn’t sure of the impact. Carole Carlson, Chicago Tribune, 16 June 2025
Adverb
Of course, that’s a conversation for the fall (though the weather in Minneapolis and Detroit this week sure feels like playoff weather). Zack Meisel, New York Times, 22 May 2025 And if anybody thinks things get easier now that the Celtics have been booted all the way to next season must have missed what the Pacers just did to the Cavaliers, whose regular season sure was better than Boston’s. Mike Lupica, New York Daily News, 20 May 2025 See All Example Sentences for sure
Recent Examples of Synonyms for sure
Adjective
  • Brother Rice coach Sean McBride felt confident giving Sheehan the ball.
    Steve Millar, Chicago Tribune, 14 June 2025
  • Currently, the scientist can't be totally confident that these spikes are connected to supernovas.
    Robert Lea, Space.com, 13 June 2025
Adjective
  • But policy continuity is key to attracting the foreign investment necessary to realize these goals.
    Charlie Campbell, Time, 13 June 2025
  • Of course, stepping in is sometimes necessary, especially depending on one's life or career stage.
    Ujjwal Ramtekkar, Forbes.com, 12 June 2025
Adjective
  • The entire production throughput is becoming faster and more reliable.
    Pradeep Govindasamy, Forbes.com, 16 June 2025
  • Advertisement To put all that in context, recall that Black voters are the most reliable members of the Democratic coalition and the Black Church is the only reason these numbers aren’t even worse.
    Philip Elliott, Time, 16 June 2025
Adjective
  • Brown, the top returning rusher in the league (1,173 yards as a true freshman), will be running behind an offensive line that returns only one starter.
    Manny Navarro, New York Times, 20 June 2025
  • Beyond all of the twists and many, many, many turns that kept viewers tuned in every Tuesday night, the core of the show was about true female friendship and the loyalty that comes with that, no matter what.
    Lexi Carson, HollywoodReporter, 20 June 2025
Adjective
  • There’s little conclusive evidence yet that creatine boosts cognition.
    Staff Author Published, Verywell Health, 11 June 2025
  • While some research in animals and human cells suggests glyphosate may cause DNA damage and atrazine could mess with hormones, there isn’t currently any conclusive evidence of harm in people based on how we’re being exposed (including in relation to cumulative risk).
    Erica Sloan, SELF, 10 June 2025
Adverb
  • With today being the first official day of summer, things are definitely heating up.
    Okla Jones, Essence, 20 June 2025
  • And that, my fellow leaders, is a rare privilege that is definitely worth the cost.
    Joe Altieri, Forbes.com, 20 June 2025
Adjective
  • Watch how the characters hit and hold certain key poses as the camera glides and zooms around them.
    Peter Debruge, Variety, 21 June 2025
  • On certain days of the year, near the Qorikancha, a bank with a door made up of golden plaques reflects the early-morning sun.
    Ana Karina Zatarain, New Yorker, 21 June 2025
Adjective
  • This trend is inevitable, driven by the enormous potential underneath AI and blockchain’s synergistic benefits.
    Forbes.com, Forbes.com, 12 June 2025
  • While the timing of Trump’s parade and Charles’ Trooping the Color birthday celebration may be a coincidence, the comparisons are inevitable, with the U.S. president likewise using a military event to assert his role as head of state, as Vanity Fair writer Erin Vanderhoof said.
    Martha Ross, Mercury News, 12 June 2025

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Cite this Entry

“Sure.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/sure. Accessed 24 Jun. 2025.

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