What title is commonly used to refer to the pope?

The title "Supreme Pontiff" is commonly used to refer to the pope, highlighting his role as the highest spiritual leader within the Roman Catholic Church. The term "pontiff" originates from the Latin word "pontifex," which means bridge-builder, signifying the pope's responsibility in bridging the connection between humanity and God, as well as guiding the Church in matters of faith and doctrine.

This title underscores the authority and leadership position the pope holds in the global Catholic community, emphasizing his spiritual guidance and the centrality of his office in maintaining the Church's teachings and practices. The use of "Supreme" indicates the pope's ultimate authority in spiritual and ecclesiastical matters, reinforcing his role as the primary representative of the Catholic faith.

In contrast, other titles mentioned in the question refer to different roles or positions within the Christian Church. The Archbishop of Canterbury is the senior bishop of the Church of England, while a Cardinal of Rome may also be a high-ranking Catholic official but does not carry the same level of authority as the pope. The title "Premier Bishop" is not commonly recognized or used within the context of the Roman Catholic Church, thereby differentiating the Supreme Pontiff as the correct and widely accepted designation for the pope