Cyclones, typhoons and hurricanes are all same type of system, except the winds rotate clockwise south of the equator and anticlockwise north of the equator. These form generally from about 5 deg N/S of the equator to about 20deg N/S of the equator and are basically tropical depressions on steroids. Tornado's are different, but they can be spawned around the eyewall of hurricanes, cyclones and typhoons.
Nevertheless all are really deadly systems. Luckily cyclones etc lose their fuel once over land, but tornado's are at their most deadly and more prevalent over land.
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