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 Are there certain types of egg preparations that handle freezer storage better than others? Taylor Tobin, Southern Living, 29 Mar. 2025 Congressional Republicans have so far declined to hold traditional oversight hearings on the government overhaul where lawmakers could question administration officials about their actions and extract public commitments to protect certain programs. Maya C. Miller, New York Times, 28 Mar. 2025 As some of America’s biggest and most recognizable companies, CEOs and boards of directors continue to speak out for and against certain social and geopolitical issues—particularly DEI —consumers have begun to draw their own conclusions about how these actions will affect them and their families. Doug Melville, Forbes, 17 Mar. 2025 In contrast, O’Neill Burke’s early policy announcements have been more typical of a tough-on-crime approach, pledging to automatically seek pretrial detention for certain offenses and directing prosecutors to seek prison sentences in every felony case involving machine gun-type weapons. Madeline Buckley, Chicago Tribune, 17 Mar. 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
  • In one of Saturday’s upsets sure to bust more than a few brackets, No. 10-seed Arkansas took down No. 2 St. John’s 75-66.
    Andrew Torgan, CNN, 23 Mar. 2025
  • The chaos of disinformation, the constant noise in public life, rule of law disappearing, the beginnings of fear, the worry about communications privacy, and much else are the sure signs.
    Melik Kaylan, Forbes, 22 Mar. 2025
Adjective
  • Here’s what usually happens next JPMorgan cuts Tesla price target, sees stock getting slashed in half Goldman gave clients a stable stock list to buy if there’s a recession.
    Jessica Dickler, CNBC, 22 Mar. 2025
  • The gap remained stable, and Piastri, who started P3, hovered further behind Verstappen.
    Luke Smith, The Athletic, 22 Mar. 2025
Adjective
  • Obviously, a body's oxygen demand increases with activity, so specific training is necessary to lengthen that skill.
    Skyler Caruso, People.com, 1 Apr. 2025
  • The report concludes that no action is necessary from Devlin’s office, as the man suspected in Bailey’s killing, 35-year-old Cecil J. Mills, has already been arrested.
    Justin Muszynski, Hartford Courant, 1 Apr. 2025
Adjective
  • What was long known to be fixed and reliable is now fluid and frightening.
    Ben Travers, IndieWire, 23 Mar. 2025
  • But don't just take it from us, pick up their new cookbook or explore their recipe archives (found for free on their site) filled with reliable formulas for all sorts of baked goods.
    Alana Al-Hatlani, Southern Living, 22 Mar. 2025
Adjective
  • Your provider may order laboratory tests to make a definite diagnosis.
    Laura Schober, Health, 7 Mar. 2025
  • The bottom line: There is still a strong push to regulate tech more strongly in D.C., and some definite throughlines from Biden to Trump on antitrust.
    Ashley Gold, Axios, 3 Mar. 2025
Adjective
  • The guard is one of the more clutch players in the league so if the game gets tight toward the end, Denver feels confident with Murray on the court.
    Thomas G. Moukawsher, Newsweek, 22 Mar. 2025
  • The stealth nature and structure of the agreement in addition to the comments made by Caesars and Icahn strongly indicate that this is a very amicable arrangement, and that Icahn is confident in management’s ability.
    Kenneth Squire, CNBC, 22 Mar. 2025
Adjective
  • In their final game in purple and gold Johnson ended up scoring 24 second-half points on 8-of-9 shooting, and led all scorers with 28 points and Morrow had 15 points and seven rebounds.
    Allison Smith, Forbes.com, 31 Mar. 2025
  • Harrison Burton also confronted Smith. Smith talked about the final laps with reporters.
    Ryan Gaydos, FOXNews.com, 30 Mar. 2025

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Cite this Entry

“Certain.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/certain. Accessed 5 Apr. 2025.

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