"Thereover" is a seldom used word in modern English and can be replaced by several synonyms which are more frequently used in conversations. One of the synonyms for "thereover" is "above" which generally means higher in position or place. Another synonym is "on top of", which implies something is placed or situated above another thing. "Over there" is a commonly used phrase that conveys the same meaning as "thereover" in a more natural way. Other synonyms for "thereover" are "above that" or "higher than that". These synonyms provide a more straightforward and clear way of communicating the intended message, making the conversation more understandable.