Eparch is a term used to describe a bishop in the Eastern Orthodox Church. However, there are several synonyms for this word that can be used interchangeably. One of the most commonly used synonyms is Metropolitan, which is a bishop who oversees a region or diocese. Another synonym for Eparch is Archimandrite, which is a title given to a senior abbot. The word Exarch is also used as a synonym and refers to a bishop who has authority over a large territory or church province. Lastly, the word Protopresbyter is used occasionally to describe the highest ranking priest in a diocese. All of these synonyms are used in specific contexts within the Eastern Orthodox Church hierarchy.