Related Clues:
- Unsinkable ice sheet
- It's mostly underwater
- It's frozen and floating
- A floating mountain
- Huge mass of frozen water
- Maritime danger, mostly underwater
- A field of floating ice
- Large mass of floating water
- Large floating mass of frozen water
- Floating mountain
- A large lump of floating ice
- A floating ice mountain
- Mass of floating ice
- A floating lump of ice
- Type of crisp lettuce