noun
volcano
vahl-KAY-noh/vɑːlˈkeɪnəʊ/
A mountain or opening in the earth through which lava, ash, and gases can escape.
The volcano sends ash into the air while lava runs down its slope.

Etymology
Vulcanus was the Roman god of fire and metalworking. The Romans regarded Mount Etna as his forge, connecting his name with mountains that expel molten rock and flames.
In context
the molten lava sprang from the volcano and rushed down on the village below
More examples
- Several volcanoes remain active in the region.
- The volcano had been quiet for many years.
- Scientists monitored gases escaping from the volcano.
Forms
volcano · volcanoes · volcanos