exhorter
Exhorter is a term that refers to a person who issues exhortations—strong encouragement, urging, or admonition intended to persuade others to adopt a belief, take a course of action, or change behavior. In general English usage, exhorter is relatively rare; the base verb exhort yields the agent noun exhorter to describe someone who exhorts.
Etymologically, exhorter comes from the Latin exhortare, meaning to urge or encourage, formed with the agent
In Christian contexts, exhorter historically denotes a role or office involving exhortation, rather than formal doctrinal
Beyond religious use, exhorter can denote anyone who urges others to act, improve, or adopt a course