Scribe
Legend
Actually the 5e designers have specifically called it "innate" magic. Like a dragon's, or beholder's, ability fly. This is magic that can be dispelled. I don't think this is ever noted in the books, but I could be wrong.
Sure, thats exactly the kind of thing I've mentioned.
Magic is not a four letter word. We can call it anything we want, but if its not blood and sinew, which we know the limits of, even if we squint and suspend belief a bit, then its a gremlin.
Now, I doubt any hearts and minds are going to be shifted on this, and it doesnt matter anyway. People can continue to pine for their Fighter to swing in the direction of a Galleon, and cut it in half, and other people can continue to roll their eyes at the idea.