| Quill(noun, name, volcano, geology) |
| Quilotoa(noun, name, volcano, geology) |
| Raikoke(noun, name, volcano, geology) |
| Ranakah(noun, name, volcano, geology) |
| Rasshua(noun, name, volcano, geology) |
| Red Mountain(expression, name, volcano, geology) |
| Reventador(noun, name, volcano, geology) |
| Sabancaya(noun, name, volcano, geology) |
| Sakurajima(noun, name, volcano, geology) |
| Sangay(noun, name, volcano, geology) |
| Sebuku(noun, name, volcano, geology) |
| Shield Nunatak(expression, name, volcano, geology) |
| Shiveluch(noun, name, volcano, geology) |
| Skjaldbreiour(noun, name, volcano, geology) |
| Snaefellsjokull(noun, name, volcano, geology) |
| Soputan(noun, name, volcano, geology) |
| Stromboli(noun, name, volcano, geology) |
| Submarine(noun, name, volcano, geology) |
| Sunset Crater(expression, name, volcano, geology) |
| Surt(noun, name, volcano, geology) |