Supposition and Surmise

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

Surmise is a synonym for supposition in guess topic. In some cases you can use "Surmise" instead the word "Supposition" as a noun or a verb, when it comes to topics like belief, opinion, assumption, theory. popular alternative

Surmise

Surmise noun - An opinion or judgment based on little or no evidence.
Usage example: my surmise is that the couple's “good news” is the announcement that they are going to have a baby

Supposition is a synonym for surmise in opinion topic. You can use "Supposition" instead a noun "Surmise", if it concerns topics such as assumption, guess, theory. popular alternative

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