Presumption and Supposition

Presumption

Presumption noun - Something taken as being true or factual and used as a starting point for a course of action or reasoning.
Usage example: the presumption of innocence

Supposition is a synonym for presumption in assumption topic. In some cases you can use "Supposition" instead a noun "Presumption", when it comes to topics like conjecture, anticipation, belief, hypothesis. popular alternative

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

Presumption is a synonym for supposition in conjecture topic. You can use "Presumption" instead a noun "Supposition", if it concerns topics such as assumption, anticipation, belief, guess. popular alternative

Cite this Source
Supposition and Presumption. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/presumption/supposition
Presumption & Supposition. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/presumption/supposition>.
Supposition or Presumption. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/presumption/supposition.
Google Ngram Viewer shows how "presumption" and "supposition" have occurred on timeline