What is the difference between cyclone, hurricane, tornado and twister?

Technically, a cyclone is any kind of circular wind storm. But now, it is only used to describe a strong tropical storm found off of the coast of India. Hurricanes and Typhoons are the same thing, but in different places. On the coast of Florida it is called hurricane.

In the Philipines, it is called typhoon. Hurricanes occur in the Atlantic and typhoons, in the Pacific. Basically, hurricanes and typhoons form over water and are huge, while tornados form over land and are much smaller in size.

A tornado is a violent windstorm characterised by a twisting, funnel-shaped cloud. In the United States, twister is used as a a colloquial term for tornado.