Answer: palindromes

AnswerCrossword Clue
PALINDROMESReviver, radar, rotor, etc.
PALINDROMESThree pairs of them end the answers to starred clues
PALINDROMES"Madam, I'm Adam," and others.
PALINDROMESRadar, sis and arara
PALINDROMESWhat the ends of the answers to all the starred clues are
palindromesA word, phrase, or sequence that reads the same backward as forward, e.g., madam or nurses run
palindromesPALINDROME, a word or statement that communicates the same message when the letters of which it is composed are read in reverse order