Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun volcano

2 senses of volcano

Sense 1
vent, volcano -- (a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt)
       => crack, cleft, crevice, fissure, scissure -- (a long narrow opening)

Sense 2
volcano -- (a mountain formed by volcanic material)
       => mountain, mount -- (a land mass that projects well above its surroundings; higher than a hill)