Certain
Necessary
Necessary adjective - Impossible to avoid or evade.
Usage example: taxes will always be a necessary evil
Certain is a synonym for necessary in inevitable topic. Sometimes you can use "Certain" instead an adjective "Necessary".
Nearby Words: necessity, necessarily
Mutual synonyms
Related pairs
Both words in one sentence
- Then the sequel to Lincle, IIDX 20 tricoro has the Astran Lights, certain pairs of which are necessary to unlock certain boss songs.
Source: Guide Dang It / Other -
They make up a lot of the game's content, and some are necessary to make certain demons-even certain types of demons-available for fusion.
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However you can swim in certain areas of light blue water, which is necessary to rescue certain Gobbos.
Source: Grimy Water
Cite this Source
Necessary and Certain. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/certain/necessary
Certain & Necessary. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/certain/necessary>.
Necessary or Certain. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/certain/necessary.
Google Ngram Viewer shows how "certain" and "necessary" have occurred on timeline