religionist

noun

1. An adherent of a religion.

   “How could Christians and other kinds of religionists justify being ruled by laws and rules, written and unwritten, that go against their faith?”

   “With what astoundment would ye, if ye were alive with your merely human perfections, listen to the creed of our, so called, rational religionists!”

2. An adherent of a religion.

adj

1. Relating to religious people
2. Motivated by religious beliefs