Certain
Certain adjective - Not likely to fail.
Usage example: chicken soup is grandma's certain cure for pretty much whatever ails you
Infallible is a synonym for certain in property topic. In some cases you can use "Infallible" instead an adjective "Certain", when it comes to topics like character trait, reliable, unfailing, inevitable. popular alternative
Infallible
Infallible adjective - Not being or likely to be wrong.
Usage example: a teacher with an infallible memory for names
Certain is a synonym for infallible in unfailing topic. You can use "Certain" instead an adjective "Infallible", if it concerns topics such as sure, property, character trait, unerring. popular alternative
Nearby Words: infallibly, infallibility
Mutual synonyms
Related pairs
- secure and certain
- secure and infallible
- positive and certain
- positive and infallible
- true and certain
- true and infallible
- accurate and certain
- accurate and infallible
- precise and certain
- precise and infallible
- definite and certain
- definite and infallible
- reliable and certain
- reliable and infallible
Both words in one sentence
- Infallible Narrator: The Storyteller is clearly this for the most part, recalling long-past events with inhuman precision, although it is implied that she does embellish certain details.
Cite this Source
Infallible and Certain. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/certain/infallible
Certain & Infallible. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/certain/infallible>.
Infallible or Certain. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/certain/infallible.
Google Ngram Viewer shows how "certain" and "infallible" have occurred on timeline