What's the difference between typhoon, tornado, hurricane and tropical cyclone?

Typhoon is a classification of tropical cyclones in Asia-Pacific countries or regions north of the equator and west of international date line. The highest level of tropical cyclone. Broadly speaking, tropical cyclones (including tropical storms, severe tropical storms and typhoons defined by the World Meteorological Organization) with sustained central wind speed of17.2m per second are all called typhoons.

Tornado is a form in which a small part of the huge energy of thunderstorm is released in a small area. It is the strongest vortex phenomenon in the atmosphere.

Hurricane: The sustained wind speed in the center of tropical cyclone reaches 12.

Cyclone is the abbreviation of tropical cyclone all over the world, because typhoon has become the common name of tropical cyclone in the northwest Pacific, and hurricane is the patent of Atlantic Ocean and East Pacific Ocean.