Related Clues:
- Lunar surface feature
- Volcanic depression
- Aperture to allow an escape
- Large bowl-shaped hollow
- Opening for air
- Hole of volcano or bomb
- Fissure in the earth's crust
- Volcanic depresssion
- Express freely as with emotions
- Bowl-shaped cavity as on volcano peak
- Opening in a volcano
- Great hole as on top of volcano
- Hole in the top of a volcano
- Give outlet as to feelings
- Hole for gas or air to escape