The palindrome for the back of a ship is "stern." A palindrome reads the same forwards and backwards, but "stern" itself is not a palindrome. However, if you're looking for a playful approach, "Stern is a term" can be seen as a phrase that hints at the concept while not being a true palindrome.
"A man, a plan, a canal, Panama!" is a palindrome that could refer to a ship's deck.
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civic
poop
poop (deck)
The "poop" deck on a ship is an elevated deck above the poop cabin, at the rear of a ship.
The high deck is the "poop" deck (poopdeck).
It's from the Greek palindromos, meaning "running back again."
palindrome
A Palindrome.
palindrome
reviver