preacher

noun1

1. •
   Someone who preaches a worldview, philosophy, or religion, especially someone who preaches the gospel and especially a clergyman or clergywoman. In a religious context, usually used only to refer to Protestant Christian clergy.

   • The born preacher we feel instinctively to be our foe. He may do some good to the wretches that have been struck down and lie gasping on the battlefield: he rouses antagonism in the strong. — 1859