Can you call the stuffing you put in Turkey "filling"? They seem a bit similar to me, but a lot of people argue that the answer is "stuffing" and that you can't call it "filling".
I am from Eastern Pennsylvania, where we call it "Filling".
Good luck convincing the rest of the world, though. I catch crap for it all the time.

Filling, Stuffing, Dressing....It's all the same, regional dialects aside.