Certain
Certain adjective - Having been established and usually not subject to change.
Usage example: a certain percentage of the profits will go to charity
Reliable is a synonym for certain in character trait topic. In some cases you can use "Reliable" instead an adjective "Certain", when it comes to topics like unfailing, undoubtable. popular alternative
Reliable
Reliable adjective - Worthy of reliance or trust.
Usage example: a reliable source of information
Certain is a synonym for reliable in trustworthy topic. You can use "Certain" instead an adjective "Reliable", if it concerns topics such as dependable, unfailing, sure. popular alternative
Mutual synonyms
Both words in one sentence
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Certain parts of the world had to be ceded to the zombies and evacuated because there was no reliable way to get rid of enough to make the areas safe for habitation.
Source: Literature / Newsflesh -
Neon Genesis Evangelion: Along with a certain pose, Gendo Ikari is a reliable owner of one of these.
Source: Perpetual Frowner -
A certain amount of time was spent building him up as cautious, reliable, and Admiral Motti's confidant.
Source: Literature / Death Star
Cite this Source
Reliable and Certain. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/certain/reliable
Certain & Reliable. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/certain/reliable>.
Reliable or Certain. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/certain/reliable.
Google Ngram Viewer shows how "certain" and "reliable" have occurred on timeline