Certain
Certain adjective - Known but not named.
Established is a synonym for certain in determined topic. In some cases you can use "Established" instead an adjective "Certain", when it comes to topics like fixed, characteristic.
Established
Established adjective - Brought about or set up or accepted; especially long established.
Certain is a synonym for established in characteristic topic. Sometimes you can use "Certain" instead an adjective "Established", if it concerns topics such as determined, conclusively proved.
Nearby Words: establishment, establishing
Mutual synonyms
Related pairs
Both words in one sentence
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The Agents had previously been established to communicate similarly, suggesting it may be a possibility for certain programs.
Source: Film / The Matrix Reloaded - Before Watchmen makes it explicit that something similar to the latter is what happened, though whether the Veidts were Jewish is never established for certain.
Source: Word of Dante - This usually means that any effect that has already been established to occur or progress at a certain fixed rate or timeframe will suddenly progress much faster if it reoccurs later.
Cite this Source
Established and Certain. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/certain/established
Certain & Established. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/certain/established>.
Established or Certain. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/certain/established.
Google Ngram Viewer shows how "certain" and "established" have occurred on timeline