Syncretism

Now, this word is one that I use differently, so I may yet add more or write my own definition. (In the interim, you could read this article of mine.)

This definition is not mine. I've been inspired to write something as a result of reading the definitions at Ember's blog "EmberVoices: Listening for the Vanir", in her post A Theological Glossary.

I'm not going to give the actual definitions, but you will find her definition and explanation and discussion of the differences between terms there, and you can also find the online Oxford Dictionary's definition here.