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

Examples 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 The coatings work by interfering with certain wavelengths of light, eliminating their reflection; therefore, more light enters your optics and can pass through to your eyes. Matt Morris, Space.com, 16 Jan. 2025 Some studies suggest that certain techniques can help with hypertension. Angela Ryan Lee, Verywell Health, 16 Jan. 2025 But even with its attractive pricing, BYD’s foray into the South Korean market faces headwinds ranging from a public fear about EV safety to tighter rules for cars with certain batteries and slowing sales. Heejin Kim, Fortune Asia, 16 Jan. 2025 Commenters debated whether certain dog breeds were more prone to loafing and stretching in this way. Michael Gfoeller and David H. Rundell, Newsweek, 16 Jan. 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
  • This is the fastest, surest way for losing franchises to U-turn back to contention.
    Andrew Callahan, Boston Herald, 12 Jan. 2025
  • What To Know About Nesting Parties Basically, instead of sitting around and opening gifts and playing games—which can still be fun, sure—a nesting party is a more practical approach to getting ready for a new baby.
    Melissa Willets, Parents, 11 Jan. 2025
Adjective
  • Warframe is the model that the industry largely ignores, for whatever reason, despite being arguably the most successful and stable.
    Paul Tassi, Forbes, 12 Jan. 2025
  • In addition to Strong's scrap and boatyard, the stable where Curly would care for Tommy's racehorses resided here.
    Matt Cabral, EW.com, 12 Jan. 2025
Adjective
  • That relentless focus is necessary, especially for a team that has struggled defensively — an area long associated with Thibodeau’s coaching identity.
    Kristian Winfield, New York Daily News, 19 Jan. 2025
  • Timing one’s necessary exit from power is, of course, one of life’s most vexing conundrums and Biden hardly is alone in blowing the moment.
    The Editorial Board, Chicago Tribune, 19 Jan. 2025
Adjective
  • Countries or political actors involved in conflicts have incentives to hide or manipulate these numbers, while third parties might not have access to reliable information.
    Daniel R. Depetris, Newsweek, 10 Jan. 2025
  • Kiviranta plays the kind of reliable 200-foot game a Finnish coach demands, and he’s delivered strong play-driving metrics this season.
    Chris Johnston, The Athletic, 10 Jan. 2025
Adjective
  • Ultimately, though, this is an out-of-favour player arriving on loan for five months, so there is a definite ceiling to the excitement.
    Alex Brodie, The Athletic, 6 Jan. 2025
  • This one looks like a definite must-see for families.
    Lynnette Nicholas, Parents, 6 Jan. 2025
Adjective
  • The surgeons, however, were confident about the procedure for the four-time PGA Tour winner.
    Bryce Miller, San Diego Union-Tribune, 21 Jan. 2025
  • For his part, quarterback Jalen Hurts looked poised and confident in the pocket (despite taking a safety against the Rams), completing 75 percent of his passes with snow circling in Lincoln Financial Field.
    Jess Bryant, The Athletic, 21 Jan. 2025
Adjective
  • After Trump doubled down on his demands for the two sides to come to an agreement in the final days of the Biden administration, Witkoff held an urgent meeting with Netanyahu last Saturday, notably the Sabbath, the Jewish day of rest.
    Yaakov Katz, Newsweek, 17 Jan. 2025
  • Ohio State fans’ visceral reaction to losing to Michigan was in part because we have been conditioned for generations to believe a two-loss team, particularly when one of those losses occurs in the final game, signals the end of the season.
    Jason Lloyd, The Athletic, 17 Jan. 2025

Thesaurus Entries Near certain

Cite this Entry

“Certain.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/certain. Accessed 24 Jan. 2025.

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