There are several synonyms for the term "eight hundred." Some of the commonly used synonyms include "800," "octo-centennial," "eight hundredth," and "dvě stě." These synonyms are used to express the numerical value of eight hundred in different languages and terms. For example, "octo-centennial" is commonly used in special events or celebrations to mark the 800th anniversary or occasion. Similarly, "dvě stě" refers to eight hundred in the Czech language. While these synonyms may vary in terms of usage and context, they all serve to convey the same numerical value of eight hundred in different ways.