What's the noun for pantheists? Here's the word you're looking for.
pantheism
(religion) The belief that the Universe is in some sense divine and should be revered. Pantheism identifies the universe with God but denies any personality or transcendence of such a God.
“For, historically, pantheisms do not identify the divine with nature as such but, rather, with nature's substance or essence or inner being or power.”
“One need only think of various Eastern pantheisms in the Hindu, Buddhist, and Taoist traditions or of the Western pantheisms associated with negative theology.”