Palindromes are spelled the same forward and backward...if you know that, then the question is easily answered. Something along the lines of "yay," perhaps?
"Wow" is a palindrome of an expression of delight.
Wow
Aha! Oho!
Aha! Oho!
aha, oho, wow
Oho! Aha! Wow!
Wow!
Oho Aha
Aha! Oho!
oho, aha
wow
Delight is stressed on the second syllable.
Much to his delight, he saw his friend after an year. This is a sample sentence using the word delight.