Something that’s "syncretic" (sin-KRET-ik) unites and blends together different systems (e.g., philosophical, moral, or religious). The word is from the Greek for "to unite against a common enemy" (in the manner of the Cretan cities).

Example (as used by Jason Burke in The Observer): "Indonesia is known for its moderate, syncretic, inclusive brand of Islam. People see no difficulty in worshipping Allah and sea spirits."