Palindrome

A word, phrase, or series that can be read both forward and backward.

• Word A ↔ Word A is the rule.
•  For instance:

1. Racecar ↔ Racecar
2. Madam ↔ Madam
3. Kayak ↔ Kayak

Emordnilap

A word that, when spelled backwards, sounds different.

• Word A ↔ Word B is the rule.
• For instance:

1.   Desserts ↔Stressed
2. Repaid ↔ Diaper
3. Star ↔Rats

It should be noted that "Emordnilap" is simply "Palindrome" spelled backwards.

Thats all for now , English is a very funny and interesting language.