If you read it backwards it spells {Palindromes}

A palindrome is a word or phrase that reads the same forward and backward Mom, level); a semordnilap forms a different word backwards (saw/was, diaper/repaid).

The word 'semordnilap' is a name for a word that makes another word when read backwards. 'Semordnilap' is 'palindromes' itself when read backwards.

While palindromes are words that spell the same backwards (like radar, racecar), semordnilaps are reverse anagrams, words that spell different words when they are spelled backward, such as liar/rail, diaper/repaid, desserts/stressed.

(see related link for a list)

It is pronounced "sem-or-dni-lap" - the word palindrome spelled backwards.

Semordnilap.