Palindromes are words which are the same spelt backwards. What is the word for a word which is another word spelt backwards?
There is no generally accepted term. The simplest word for such words is something like semi-palindrome or half-palindrome. However, some other suggestions have been made, including the elegant heteropalindrome, the ugly reversgram (or better reversible anagram) and the outrageous semordnilap!
The sentence rats live on no evil star is full of these semi-palindromes.