exhorter
/ˈɛksˌhɔrtər/Definitions
1. noun
A person who exhorts or persuades others, often in a forceful or urgent manner.
“The preacher acted as an exhorter during the town’s revival meeting.”
2. verb
To urge or persuade someone to do something, often in a forceful or urgent manner.
“The teacher exhorted the students to work harder.”