Assumption
Assumption noun - Something taken as being true or factual and used as a starting point for a course of action or reasoning.
Usage example: your argument is faulty because it's based on erroneous assumptions
Belief is a synonym for assumption in supposition topic. In some cases you can use "Belief" instead a noun "Assumption", when it comes to topics like presumption, proposition, something expected.
Belief
Belief noun - An idea that is believed to be true or valid without positive knowledge.
Usage example: it's my belief that the sky is blue because our eyes perceive the color blue easily
Assumption is a synonym for belief in opinion topic. You can use "Assumption" instead a noun "Belief", if it concerns topics such as proposition, putting regard in as true, something regarded as true.
Mutual synonyms
Related pairs
- feeling and assumption
- feeling and belief
- inference and assumption
- inference and belief
- conviction and assumption
- conviction and belief
- notion and assumption
- notion and belief
- opinion and assumption
- opinion and belief
- impression and assumption
- impression and belief
- view and assumption
- view and belief
How words are described
| common | common assumption | common belief |
| original | original assumption | original belief |
| initial | initial assumption | initial belief |
| correct | correct assumption | correct belief |
| Other adjectives: naive, popular, strong, bad, false, personal, widespread, general, apparent, unreasonable, erroneous, mistaken, misguided, fundamental, central, justified. | ||
Both words in one sentence
- To further that assumption, she went along with the target's belief that she was Lando's woman.
Source: Urban Legend Love Life -
Sam tells him that he can't shoot him, making Frasier angrily mock that he's making that assumption on his belief Frasier doesn't have it in him and Sam doesn't view him as a threat.
Source: Series / Cheers -
There's a reason that therapists are in short supply in many stories, both because of the assumption that True Art Is Angsty, and the belief that conflicted characters are more interesting.
Source: Accentuate the Negative
Cite this Source
Belief and Assumption. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/assumption/belief
Assumption & Belief. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/assumption/belief>.
Belief or Assumption. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/assumption/belief.
Google Ngram Viewer shows how "assumption" and "belief" have occurred on timeline