Assumption is a word that refers to a belief or statement that is taken to be true without proof. There are numerous synonyms for the word, each with slightly different connotations. Some common synonyms include presumption, conjecture, presupposition, and hypothesis. Presumption emphasizes the confidence with which someone makes an assumption, while conjecture emphasizes the lack of evidence supporting the assumption. presupposition often refers to the underlying assumptions that someone makes and that can often go unacknowledged. Hypothesis, on the other hand, is a term more commonly used in scientific contexts, emphasizing the role that empirical evidence plays in determining whether an assumption has merit. Regardless of the exact synonym used, it's important to remember that assumptions should always be questioned and tested, rather than simply taken for granted.