| Agua(noun, name, volcano, geology) |
| Agua de Pau(expression, name, volcano, geology) |
| Aguilera(noun, name, volcano, geology) |
| Agung(noun, name, volcano, geology) |
| Ahyi(noun, name, volcano, geology) |
| Aira(noun, name, volcano, geology) |
| Akagisan(noun, name, volcano, geology) |
| Akan(noun, name, volcano, geology) |
| Akandanayama(noun, name, volcano, geology) |
| Akita-Komagatake(noun, name, volcano, geology) |
| Akita-Yakeyama(noun, name, volcano, geology) |
| Akuseki-jima(noun, name, volcano, geology) |
| Akutan(noun, name, volcano, geology) |
| Al Harrah(expression, name, volcano, geology) |
| Alaid(noun, name, volcano, geology) |
| Alamagan(noun, name, volcano, geology) |
| Alayta(noun, name, volcano, geology) |
| Alcedo(noun, name, volcano, geology) |
| Ale Bagu(expression, name, volcano, geology) |
| Alid(noun, name, volcano, geology) |