A "god" is simply a being that's acknowledged as worthy of worship.
I didn't realize there was question on this - Christopher's explanation has been the obvious one to me all along. They are Prophets... because they prophecize.
"Prophecize" is not a real word. The verb, or act of making a prophecy, is to prophesy
(with an 'S').
Sorry, but it drives me up the wall when people say that.