Conjecture and Speculation

Conjecture

Conjecture noun - An opinion or judgment based on little or no evidence.
Usage example: the many conjectures about the true identity of Jack the Ripper

Speculation is a synonym for conjecture in guess topic. In some cases you can use "Speculation" instead a noun "Conjecture", when it comes to topics like opinion, intuition, belief, assumption. popular alternative

Speculation

Speculation noun - A hypothesis that has been formed by speculating or conjecturing (usually with little hard evidence).
Usage example: speculations about the outcome of the election

Conjecture is a synonym for speculation in theory topic. You can use "Conjecture" instead a noun "Speculation", if it concerns topics such as opinion, intuition, belief, assumption. popular alternative

How words are described

pure pure conjecture pure speculation
wild wild conjecture wild speculation
above above conjecture above speculation
scientific scientific conjecture scientific speculation
Other adjectives: educated, baseless.
Cite this Source
Speculation and Conjecture. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/conjecture/speculation
Conjecture & Speculation. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/conjecture/speculation>.
Speculation or Conjecture. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/conjecture/speculation.
Google Ngram Viewer shows how "conjecture" and "speculation" have occurred on timeline