nun is basic word for the use of describing a female member of a certain religion
"nun" is a palindrome that means 'a religious woman'.
Nun
nun
nun
Hannah
Eve
madam
madam
Eve
Eve, Ava, Ada
Eve, Ava, Hannah
"A woman in a convent" itself would give no palindrome, but "Nun" would give a palindrome as it is the same spelled forwards and backwards.