Palindromes word comes from Greek “Palindromes” means running backwords. A palindrome is a word or phrase where a word, phrase, or sequence that reads the same backwards as forwards, give the same word or phrase, eg: the phrase 'Madam I'm Adam'.

Examples:

(1) MALAYALAM (9 letters),
(2) ROTAVATOR (9 letters),
(3) DETARTRATED (11 letters).