| nocturnal(noun, art, performance, music, appearance) |
| nocturne(noun, art, performance, music, appearance) |
| note(noun, art, performance, music, appearance) |
| oboe concerto(expression, art, performance, music, appearance) |
| oboe quartet(expression, art, performance, music, appearance) |
| ode(noun, art, performance, music, appearance) |
| opera(noun, art, performance, music, appearance) |
| opera buffa(expression, art, performance, music, appearance) |
| opera comique(expression, art, performance, music, appearance) |
| opera seria(expression, art, performance, music, appearance) |
| operetta(noun, art, performance, music, appearance) |
| oratorio(noun, art, performance, music, appearance) |
| orchestra(noun, art, performance, music, appearance) |
| orchestrate(noun, art, performance, music, appearance) |
| orchestration(noun, art, performance, music, appearance) |
| organ(noun, art, performance, music, appearance) |
| organ trio(expression, art, performance, music, appearance) |
| organum(noun, art, performance, music, appearance) |
| overture(noun, art, performance, characteristic, music) |
| paraphrase mass(expression, art, performance, characteristic, music) |