what is the name of a water tornado?
A tornado over water is given the name waterspout. Since there was at least some sentiment for believing that waterspouts were in some important way distinguishable from tornadoes, this name caught on. As you can tell from the preceding quotation, I don't believe there is any meaningful difference. Anyway, it rags me that a tornado's name would depend on the underlying surface, so part of the point of this is to come up with silly names, mostly based on what the tornado is currently encountering.