Certain and Unsubstantiated

Opposite meaning words

sentence examples

Certain

Certain adjective - Known but not named.
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Synonyms for Certain
Antonyms for Certain
Unsubstantiated is an antonym for certain.
Nearby Words: certainty, certainly

Unsubstantiated

Unsubstantiated adjective - Having no basis in reason or fact.
Usage example: an unsubstantiated claim that was thrown out of court
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Synonyms for Unsubstantiated
Antonyms for Unsubstantiated
Certain is an antonym for unsubstantiated in questionable topic.
Nearby Word: unsubstantially
Similar words of certain

Similar words of unsubstantiated

Both words in one sentence

  • However, there's a certain breed of agnostic who claim that they're better than theists and atheists because they don't hold any unsubstantiated belief.
    Source: Acceptable Religious Targets
Cite this Source
Unsubstantiated and Certain. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/certain/unsubstantiated
Certain & Unsubstantiated. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/certain/unsubstantiated>.
Unsubstantiated or Certain. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/certain/unsubstantiated.

Antonyms for certain


Antonyms for unsubstantiated

Google Ngram Viewer shows how "certain" and "unsubstantiated" have occurred on timeline