| Lopevi(noun, name, volcano, geology) |
| Maipo(noun, name, volcano, geology) |
| Makanrushi(noun, name, volcano, geology) |
| Manuk(noun, name, volcano, geology) |
| Maquinna(noun, name, volcano, geology) |
| Masubi(noun, name, volcano, geology) |
| McCloud(noun, volcano, settlement, habitation) |
| Medvezhya(noun, name, volcano, geology) |
| Mehetia(noun, name, volcano, geology) |
| Mendeleyeva(noun, name, volcano, geology) |
| Methana(noun, volcano, settlement, habitation) |
| Minamishimabara(noun, volcano, settlement, habitation) |
| Miyake-jima(noun, name, volcano, geology) |
| Miyakejima(noun, volcano, settlement, habitation) |
| Momotombo(noun, name, volcano, geology) |
| Mount Bachelor(expression, name, volcano, geology, inactivity) |
| Mount Bailey(expression, name, volcano, geology, inactivity) |
| Mount Bental(expression, name, volcano, geology, inactivity) |
| Mount Edgecumbe(expression, name, volcano, geology, inactivity) |
| Mutnovsky(noun, name, volcano, geology) |