Certainty
Certainty noun - A state of mind in which one is free from doubt.
Supposition is an antonym for certainty.
Supposition
Supposition noun - An idea that is the starting point for making a case or conducting an investigation.
Usage example: my supposition is that this grape variety, which flourishes in southern France, should do equally well here, given the similar climate
How words are described
| real | real certainty | real supposition |
Cite this Source
Supposition and Certainty. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/certainty/supposition
Certainty & Supposition. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/certainty/supposition>.
Supposition or Certainty. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/certainty/supposition.
Google Ngram Viewer shows how "certainty" and "supposition" have occurred on timeline