The Collaborative International Dictionary
Syncretist \Syn"cre*tist\, n. [Cf. F. syncr['e]tiste.] One who attempts to unite principles or parties which are irreconcilably at variance; specifically (Eccl. Hist.), an adherent of George Calixtus and other Germans of the seventeenth century, who sought to unite or reconcile the Protestant sects with each other and with the Roman Catholics, and thus occasioned a long and violent controversy in the Lutheran church.
Wiktionary
n. One who attempts syncretism, the fusion of different systems or beliefs.
Usage examples of "syncretist".
And the young student was there also, the syncretist, the evolutionist.
The Syncretists were as convinced as Theosophists that all religions are really the same.
He had been born on Burning Bright, held Burning Bright citizenship, but the only remotely personal piece of information in the file was the note that his parents had been Syncretist Observants, minister/administrators of Burning Bright’s peculiar religion.