| White Horse Bluff(expression, name, volcano, geology) |
| White Island(expression, name, volcano, geology) |
| Wide Bay(expression, name, volcano, geology) |
| William(noun, name, volcano, geology) |
| Williamson Mountain(expression, name, volcano, geology) |
| Willow Peak(expression, name, volcano, geology) |
| Wilson(noun, name, volcano, geology) |
| Wuksi Butte-Twin Lakes(expression, name, volcano, geology) |
| Yabakei(noun, name, volcano, geology) |
| Yakeishi(noun, name, volcano, geology) |
| Yanaurcu de Pinan(expression, name, volcano, geology) |
| Yanpat(noun, name, volcano, geology) |
| Yatsuga-take(noun, name, volcano, geology) |
| Yayantique(noun, name, volcano, geology) |
| Yeguada(noun, name, volcano, geology) |
| Yellowstone Caldera(expression, name, volcano, geology) |
| Yichuan(noun, name, volcano, geology) |
| Yitong Group(expression, name, volcano, geology) |
| Yokosuka(noun, name, volcano, geology) |
| Yokote(noun, name, volcano, geology) |