How are tornadoes related to thunderstorms and hurricanes?

They are all type of storm and can all produce strong winds.

Hurricanes and tornadoes have more in common with each other, though, than they do with ordinary thunderstorms. For example, both have eyes, or eyelike structure (in a tornado it is called a weak echo region.) They also both rotate, which is something most thunderstorms don't do.

All tornadoes are produced by thunderstorms, some of these storms are produced by hurricanes.