| Agrihan(noun, name, volcano, geology) |
| Akita-Yakeyama(noun, name, volcano, geology) |
| Alamagan(noun, name, volcano, geology) |
| Ambrym(noun, name, volcano, geology) |
| Amirani(noun, name, volcano, geology) |
| Anatahan(noun, name, volcano, geology) |
| Aogashima(noun, name, volcano, geology) |
| Apacheta-Aguilucho volcanic complex(expression, name, volcano, geology, inactivity) |
| Aracar(noun, name, volcano, geology) |
| Arjuno-Welirang(noun, name, volcano, geology) |
| Asacha(noun, name, volcano, geology) |
| Askja(noun, name, volcano, geology) |
| Atsonupuri(noun, name, volcano, geology) |
| Avachinsky(noun, name, volcano, geology) |
| Bagana(noun, name, volcano, geology) |
| Baiae(noun, volcano, settlement, habitation) |
| Baransky(noun, name, volcano, geology) |
| Baroarbunga(noun, name, volcano, geology) |
| Baugur(noun, name, volcano, geology) |
| Beerenberg(noun, name, volcano, geology) |