Oratorio

Noun

 * 1)  A musical composition on a religious theme; similar to opera but with no costume, scenery or acting.

Thesaurus
Negro spiritual, anthem, cantata, canticle, choral singing, chorale, chorus, church music, doxology, glee, gospel, gospel music, hymn, hymn-tune, hymnody, hymnology, introit, madrigal, madrigaletto, mass, motet, offertory, offertory sentence, paean, passion, prosodion, psalm, psalmody, recessional, requiem, requiem mass, sacred music, spiritual, unison, white spiritual