The term "Supreme Pontiff" is often used to refer to the leader of the Catholic Church. However, there are several other synonyms that can be used to describe this position. One common synonym is "the Holy Father," which emphasizes the spiritual authority and paternal role of the Pope. Another synonym is "the Bishop of Rome," which emphasizes the geographical location of the Pope's See. Additionally, the Pope is often referred to as "the Vicar of Christ," indicating that he acts as a representative or stand-in for Jesus on Earth. Other synonyms for the Supreme Pontiff include "Papal Sovereign," "Papa," and "His Holiness".