noun
pontiff
PAHN-tif/ˈpɑːntɪf/
A high-ranking bishop, especially the pope.
The pontiff greets the crowd gathered in Saint Peter’s Square.

Etymology
The title for a Roman high priest was extended to Christian bishops and then to the pope. The connection is through high religious office, rather than an originally pope-specific meaning.
In context
you have a sitting Roman pontiff being accused of heresy, um the bishops decide to take action
More examples
- The newly elected pontiff chooses a name for his papacy.
- The pontiff calls for peace during his weekly address.
- Several pontiffs are buried beneath the basilica.
Forms
pontiff · pontiffs
pontifical adjective — Relating to a pope or bishop.
pontificate noun — The office or reign of a pope.