1
as in one
known but not named a certain person told me that today is your birthday

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

2
3
4
5
as in reliable
not likely to fail chicken soup is grandma's certain cure for pretty much whatever ails you

Synonyms & Similar Words

Antonyms & Near Antonyms

6

Synonym Chooser

How does the adjective certain contrast with its synonyms?

Some common synonyms of certain are cocksure, positive, and sure. While all these words mean "having no doubt or uncertainty," 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 certain?

In some situations, the words cocksure and certain are roughly equivalent. However, cocksure implies presumptuous or careless positiveness.

you're always so cocksure about everything

When is it sensible to use positive instead of certain?

While the synonyms positive and certain are close in meaning, positive intensifies sureness or certainty and may imply opinionated conviction or forceful expression of it.

I'm positive that's the person I saw

When could sure be used to replace certain?

The words sure and certain are synonyms, but do differ in nuance. Specifically, sure usually stresses the subjective or intuitive feeling of assurance.

felt sure that I had forgotten something

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 certain However, your actual payment may be lower depending on certain eligibility factors, like your income and living arrangements. Josh Hammer, MSNBC Newsweek, 22 Apr. 2025 The new rule wouldn’t apply to one-time or emergency spending, and certain expenditures would be excluded from the cap. Nolan McKendry | The Center Square, The Washington Examiner, 22 Apr. 2025 The research offers hope that stem cell transplants may be able to replace the loss of certain cells that leads to Parkinson’s symptoms. Lillian Ali, Smithsonian Magazine, 21 Apr. 2025 Changes could also be made to the threshold when certain investments can be blocked by the government, rather than just requiring notification. Owen Tedford, Forbes.com, 21 Apr. 2025 See All Example Sentences for certain
Recent Examples of Synonyms for certain
Adjective
  • Drinkwater didn't make one appearance in a Chelsea shirt last season, whilst Bakayoko spent the season in Italy on loan at AC Milan.
    SI.com, SI.com, 3 Aug. 2019
  • Decisions made by engineers today, in other words, will determine not how one car drives but how all cars drive.
    Johannes Himmelreich, BostonGlobe.com, 30 Mar. 2018
Adjective
  • The sweat, sure, but also just the indignity of it.
    Jack Lang, New York Times, 19 Apr. 2025
  • But chipping away at central bank independence, as Trump appears to be doing with his open criticism of the Fed chair and implicit threats of dismissal, is a historically sure way to high inflation.
    Ana Carolina Garriga, The Conversation, 18 Apr. 2025
Adjective
  • This independence is intended to allow the Fed to focus on its dual mandate: promoting maximum employment and maintaining stable prices.
    Nicholas Creel, MSNBC Newsweek, 18 Apr. 2025
  • The final step of the process uses what’s left after biofuel production as a stable, non-leaching crop fertilizer.
    Robin Roenker, USA Today, 18 Apr. 2025
Adjective
  • These companies feel like necessary building blocks of modern existence.
    Matteo Wong, The Atlantic, 10 Apr. 2025
  • But the success of any of NASA’s plans depends on having the money and resources necessary to carry them out.
    Wendy Whitman Cobb, The Conversation, 10 Apr. 2025
Adjective
  • When the Cubs have a lead, Counsell goes to a reliable late-game formula with relievers Julian Merryweather, Porter Hodge and Ryan Pressly.
    Patrick Mooney, New York Times, 17 Apr. 2025
  • Previously, Ming-Chi Kuo, a reliable analyst at TFI Securities, has predicted Touch ID to make a return on the iPhone Fold.
    Prakhar Khanna, Forbes.com, 17 Apr. 2025
Adjective
  • Call me crazy, but there’s a definite pulp feel to all the prison scenes and sets, too.
    Andy Andersen, Vulture, 18 Apr. 2025
  • But there was a definite hostage-video vibe to her appearances during the presidential campaign, giving students of body language a speculative field day.
    Mark Z. Barabak, Los Angeles Times, 17 Apr. 2025
Adjective
  • Investors are confident that such bold approaches will pay off, and the companies on the Technology list have collectively raised more than $300 million in recent years.
    Thomas Brewster, Forbes.com, 15 Apr. 2025
  • On the plus side, Luong is confident in keeping steady prices because Ampersand has other cost advantages.
    Ella Gonzales, Fort Worth Star-Telegram, 14 Apr. 2025
Adjective
  • The Yorktown's final resting place wasn't discovered until a 1998 expedition found it about 1,000 miles northwest of Honolulu.
    Eric Lagatta, USA Today, 24 Apr. 2025
  • Today’s sentence is the culmination of justice, but this is not the final chapter of Kyhara’s life story.
    Nicholas Williams, New York Daily News, 24 Apr. 2025

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Cite this Entry

“Certain.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/certain. Accessed 27 Apr. 2025.

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