semordnilap, ambigram, homophone, antilipo, battologism, idiomorph, lipogram, spinonym, pangram, gramogram, more...

anagram

madam, racecar, civic, level, refer, radar, kayak, pop, redder, more...

perfect, imperfect, longest, inverted, rich, famous, musical, letter, terminal, digit, base

quitter's word,   palindromic title,   palindromic time,   mooers' mouthfuls,   repeating sequences,   66 or 99, e.g.,   palindromic pokémon,   10001 initials,   palindromic woman,   symmetric lisp