is a specific kind of: leader.

is a broader term that covers: cantor, hazan | Catholicos | clergyman, man of the cloth, reverend | Evangelist | patriarch | Bishop of Rome, Catholic Pope, Holy Father, pontiff, pope, Roman Catholic Pope, Vicar of Christ | non-Christian priest, priest | rabbi.

instances of which are: Gandhi, Mahatma Gandhi, Mohandas Karamchand Gandhi.