| Tofua(noun, name, volcano, geology) |
| Tolbachik(noun, name, volcano, geology) |
| Torfajokull(noun, name, volcano, geology) |
| Tori-shima(noun, name, volcano, geology) |
| Trolladyngja(noun, name, volcano, geology) |
| Tungurahua(noun, name, volcano, geology) |
| Tupungatito(noun, name, volcano, geology) |
| Tyatya(noun, name, volcano, geology) |
| Ubinas(noun, name, volcano, geology) |
| Ulawun(noun, name, volcano, geology) |
| Ushishir(noun, name, volcano, geology) |
| Uturunku(noun, name, volcano, geology) |
| Valley Lake(expression, name, volcano, geology, inactivity) |
| Vatnafjoll(noun, name, volcano, geology) |
| Victory(noun, name, volcano, geology) |
| Viedma(noun, name, volcano, geology) |
| Villarrica(noun, name, volcano, geology) |
| Waiowa(noun, name, volcano, geology) |
| Whakaari(noun, name, volcano, geology) |
| Yangmingshan(noun, name, volcano, geology) |