Select the most appropriate one-word substitution for the given group of words.

The word which reads the same if it is read forward or backwards 

Palindrome

The most appropriate one-word substitution for "the word which reads the same if it is read forward or backwards" is palindrome.

• Conundrum is a riddle or puzzle.
• Palindrome is a word or phrase that reads the same backward as forward.
• Epilogue is a concluding section of a literary work.
• Maxim is a concise statement of a general rule or principle.