A liturgical song is a type of religious song that is used in religious ceremonies and services. The two crossword solutions for the term 'liturgical song' are 'motet' (5 letters) and 'CANTICLE' (8 letters). A motet is a polyphonic choral composition, usually based on a sacred Latin text, that is sung without accompaniment. A CANTICLE is a hymn or song taken from the Bible, typically used in Christian worship.