Assuror is a term that is not widely known. However, there are several synonyms for the word that may be more familiar. One of the most commonly used terms is "insurer," which refers to a person or company that provides insurance coverage. Another synonym for assuror is "underwriter." This term is often used in the insurance industry to describe a person or company that evaluates risk and decides whether or not to provide coverage. Other synonyms for assuror include "guarantor," "surety," and "backer." All of these terms refer to someone who provides assurance or protection against potential risks or losses.