There is no such word as I am aware. For words that end in "r," a tornado may informally be called a twister. Some people call tornadoes cyclones, but this is technically incorrect.
Team
Deceive
norm
Another word to describe the most intelligent that ends with -est is 'smartest. ' "She is the smartest girl in the room. "
or
Headache starts and ends with the letters he. Another word is heartache.
A word that starts with AN and ends with OR: ancestor.
donk
Tremble
Idle
alter
A word that starts with A and ends with U: apercu.
A word that starts with E and ends with A: extravaganza.
minimum
Team
rule = regulation
"TOURIST"