The term CALIPH is used to refer to a RULER in Islamic tradition. This term is composed of six words: RULER (5 letters), IMAM (4 letters), ALI (3 letters), OMAR (4 letters), ABU (3 letters), ALLAH (5 letters), and ISLAM (5 letters). The first two words, RULER and IMAM, refer to the leader of an Islamic state, while ALI, OMAR, and ABU are names of prominent figures in Islamic history. Finally, ALLAH and ISLAM refer to the religion of Islam itself. Together, these words form the term CALIPH, which is used to refer to a RULER in Islamic tradition.