Assumption
Assumption noun - Something taken as being true or factual and used as a starting point for a course of action or reasoning.
Speculation is a synonym for assumption in inference topic. In some cases you can use "Speculation" instead a noun "Assumption", when it comes to topics like opinion, conjecture, supposition, hypothesis. popular alternative
Speculation
Speculation noun - A risky undertaking.
Assumption is a synonym for speculation in inference topic. You can use "Assumption" instead a noun "Speculation", if it concerns topics such as opinion, conjecture, hypothesis. popular alternative
Mutual synonyms
Related pairs
- inference and assumption
- inference and speculation
- belief and assumption
- belief and speculation
- surmise and assumption
- surmise and speculation
- notion and assumption
- notion and speculation
- opinion and assumption
- opinion and speculation
- thought and assumption
- thought and speculation
- conjecture and assumption
- conjecture and speculation
How words are described
Both words in one sentence
- This makes the widespread assumption that the Doctor (especially in the classic series) is asexual more than just mere fan speculation.
Source: Word of Saint Paul -
There is a lot of speculation, but nobody really knows whether they are going to continue with their new pop sound or are planning to return to rock and VK as best they can- under the assumption that they are returning at all, of course.
Source: New Sound Album -
The design is subject to some Science Marches On, as well as criticism for the assumption that a sapient species would inevitably develop a humanoid body plan, leading to more birdlike dinosauroids◊ in later speculation.
Source: Dumb Dinos
Cite this Source
Speculation and Assumption. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/assumption/speculation
Assumption & Speculation. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/assumption/speculation>.
Speculation or Assumption. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/assumption/speculation.
Google Ngram Viewer shows how "assumption" and "speculation" have occurred on timeline