Webster's Revised Unabridged Dictionary · 1913

Religionist

Religionist , noun

One earnestly devoted or attached to a religion; a religious zealot.
The chief actors on one side were, and were to be, the Puritan religionists. — Palfrey
It might be that an Antinomian, a Quaker, or other heterodo{not transcribed} religionists, was to be scourged out of the town. — Hawthorne