sermonist
/ˈsɜrˌmənɪst/Definitions
1. noun
One who delivers or composes sermons, especially a professional preacher.
“The skilled sermonist captivated the audience with his inspiring words.”
2. noun
A person who speaks or writes in a manner that is considered pompous or tedious.
“The self-proclaimed expert’s sermonist style irritated everyone in the room.”