It is rare for tornado to actually merge, and when it does happen it usually involves a large tornado absorbing a smaller one.
In the rare cases that tornadoes do merge they simply form one bigger tornado.
Tornadoes are sometimes called twisters.
Tornadoes in the United States are simply called tornadoes. In informal contexts they are sometimes called twisters.
YES. it is possible, however it is very unlikely. Tornadoes are a rare phonemon and if you are lucky to see one join, you are lucky. The possibility is very slim that you will ever see it split back up.
Tornadoes in the U.S. are called tornadoes.
Tornadoes are sometimes called twisters, but tornado is the preferred scientific term.
Tornadoes are formally called tornadoes.
Smaller tornadoes near a larger tornadoes are often called satellite tornadoes. Smaller vortices within a tornado are called subvorticies or suction vorticies.
Tornadoes are often called twisters.
Enormous vortices have been observed on the sun that resemble tornadoes. They have been called "solar tornadoes" but they are not tornadoes by the meteorological definition.
Sometimes tornadoes are called tornadoes, though it is technically incorrect to do so.
They are also called fire whirls. This is the term preferred by scientists as they technically are not tornadoes.
A tornado that touches the ground is simply a tornado. Before it touches down it is called a funnel cloud.