The term 'palindromic title' refers to words or phrases that are spelled the same forwards and backwards. The four solutions provided for this term are MADAM (5 letters), DEED (4 letters), AGA (3 letters), and MAAM (4 letters). All of these words are palindromes, meaning they can be read the same forwards and backwards. MADAM is a polite form of address for a woman, DEED is an action or task that is done, AGA is a Turkish title of respect, and MAAM is another polite form of address for a woman.