Another name for religious extremists is "fundamentalists." This term often refers to individuals or groups who strictly adhere to specific theological doctrines and may advocate for radical interpretations of their faith. In some contexts, they may also be called "zealots" or "radicals," depending on their actions and beliefs.
In ancient Greece it could be called a paean.
Theologian
Friends
Celebration, religious ritual.
YES!!
Words that refer to religious groups include religions, faiths, denominations, congregations, churches, branches, sects, factions, orders, and cults.
A Islamic Religious teacher and a Muslim religious teacher is called a Mullah
Parochial school
The name of a country led by religious leaders is called theocracy
another name the disciples called Jesus .
They were known as Quakers.
Friends. There still exist "Friends'" church denominations in the US.