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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

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
Not sure the truffle Parm element moves the needle on fries for me. Evan Grant, Dallas Morning News, 25 Feb. 2026 Getz wasn’t sure about the messy details and deferred to team executives Brooks Boyer and Terry Savarise. Paul Sullivan, Chicago Tribune, 25 Feb. 2026
Adverb
Cruise ship wristbands and stateroom cards sure are convenient. Elizabeth Heath, Travel + Leisure, 21 Feb. 2026 And sure, gathering enough of those players on one roster would mean dominating the MAC. Jason Kirk, New York Times, 18 Feb. 2026 See All Example Sentences for sure
Recent Examples of Synonyms for sure
Adjective
  • Taking time to vet experience and alignment can make the transition into retirement more confident and financially secure.
    Lauren Schuster, Miami Herald, 26 Feb. 2026
  • The company acknowledges that this may include some alerts that are not actually a cause for concern, but feels confident in this starting point, which can be adjusted based on future user feedback.
    Sarah Scott, Parents, 26 Feb. 2026
Adjective
  • Former presidents and their spouses receive lifelong Secret Service protection under federal law, but there are no provisions guaranteeing the elite levels of private travel that were necessary features of their time in office.
    Meg Kinnard, Los Angeles Times, 28 Feb. 2026
  • Peeling is not necessary, but scrub and rinse the carrots well before using.
    Karla Walsh, Better Homes & Gardens, 27 Feb. 2026
Adjective
  • The attack was likely meant to demonstrate how the group, a once reliable and powerful proxy of the Islamic Republic, still has the capability and the will to strike on behalf of Tehran.
    Matthew Chance, CNN Money, 3 Mar. 2026
  • Again, the cast award is not a reliable best picture precursor.
    Glenn Whipp, Los Angeles Times, 2 Mar. 2026
Adjective
  • But the opposite was true Tuesday morning.
    Rachel Royster Updated March 3, Fort Worth Star-Telegram, 4 Mar. 2026
  • Luneberg lens design Autonomous vehicle safety has mostly focused on onboard tech, but true reliability may require upgrading the roads themselves.
    Mrigakshi Dixit, Interesting Engineering, 3 Mar. 2026
Adjective
  • Meta and other tech firms have long argued publicly that there is no conclusive evidence linking social media to addiction or other mental health challenges.
    CNN, Mercury News, 24 Feb. 2026
  • In the state's response to the allegations, Florida argued that Trotter's claims are speculative because the records aren't conclusive.
    Amanda Lee Myers, USA Today, 24 Feb. 2026
Adverb
  • Benner said having three children with learning disabilities has definitely impacted her life.
    Mark Curriden, Dallas Morning News, 27 Feb. 2026
  • And definitely see Sophie in noble clothes going downstairs, that would be really fun.
    Jennifer Maas, Variety, 27 Feb. 2026
Adjective
  • Greece temporarily suspended asylum claims from migrants arriving via the Libya route for three months, scrapped certain amnesty provisions and introduced mandatory imprisonment for asylum seekers whose claims are rejected.
    LEFTERIS PITARAKIS, Arkansas Online, 1 Mar. 2026
  • Historically, their focus has largely revolved around local fixes aimed at requiring companies to sell off certain cable/TV assets in certain territories where there’s not much competition.
    Winston Cho, HollywoodReporter, 28 Feb. 2026
Adjective
  • But what’s undeniable to anyone with two eyes is that Ellison, like so many corporate leaders, has been kissing up to Trump for more than a year — first to get control of Paramount and then in an attempt to make his company’s acquisition of Warners look inevitable.
    Josef Adalian, Vulture, 27 Feb. 2026
  • Many Jeeps, too, made our list, which was inevitable, and so did cars that challenge the definition, including the Mitsubishi Delica, Subaru Forester, and Mercedes Unimog.
    Robert Ross, Robb Report, 26 Feb. 2026

Browse Nearby Words

Cite this Entry

“Sure.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/sure. Accessed 4 Mar. 2026.

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