The form of theological rationalism that believes in God on the basis of reason without reference to revelation WordNet 3.0 & Open English WordNet

Deism is the philosophical position and rationalistic theology that generally rejects revelation as a source of divine knowledge, and asserts that empirical reason and observation of the natural world are exclusively logical, reliable, and sufficient to determine the existence of a Supreme Being as the creator of the universe. Wikipedia

Philosophical doctrine in which it is understood that God can be found only through the exercise of reason, and does not intervene in the Universe. Wikipedia Disambiguation

Belief in God without revelation Wikidata

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. Wiktionary