What's The Difference Between A Cyclone And A...?

Question

...hurricance and/or tornado? And why is the one in Burma so destructive?

Answer 1

They are all the same thing, different parts of the world different name.

Answer 2

Altantic cyclonic storm-hurricane (100s of mile across)

Pacific cyclonic storm-cyclone (100s of mile across)

Both of the above are just different names for the same weather system which form over areas of warm water and derive the energy from the heat released by the water, dying when over land.

Tornado's form over land when cold air and warm air meet somehowish

A tornado is defined by the Glossary of Meteorology as "a violently rotating column of air, in contact with the ground, either pendant from a cumuliform cloud or underneath a cumuliform cloud, and often (but not always) visible as a funnel cloud..."[6] In practice, for a vortex to be classified as a tornado, it must be in contact with both the ground and the cloud base. Scientists have not yet created a complete definition of the word; for example, there is disagreement as to whether separate touchdowns of the same funnel constitute separate tornadoes. (straight from wiki) (from me- yards to mile-ish across and part of a larger storm system)