You're probably thinking of the word "retrograde".
pronation
Backward force is called "retrograde" force.
Rotating chimney cowl, rotating chimney cowl, spinning cowl, revolving cowl,
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Palindrome
palindrome
A word or sentence that is spelled the same backward and forward is called a palindrome.
They are called palindromes.
A word that is spelled the same way forward and backward is called a palindrome.
Cyclone
propeller.
== == The reels.