What's the noun for deists? Here's the word you're looking for.
deism
A philosophical belief in the existence of a god (or goddess) knowable through human reason; especially, a belief in a creator god unaccompanied by any belief in supernatural phenomena or specific religious doctrines.
“By the middle of the eighteenth century, though, these long-held beliefs were beginning to be called into question, and the European deists were the primary inquisitors.”
“The US Constitution aimed to embody the ideals of diverse groups of people, from Puritans to Deists.”
“Deists reconciled science and religion by rejecting prophecies, miracles and Biblical theology.”