Related Clues:

• Titanic's downfall
• Swelling shrinker
• Floating ice mass
• Arctic navigation hazard
• Sore-ankle soother
• Only about 10 percent of it is visible
• Sprain treatment
• It keeps its head above water
• Ice chunk
• Floating ice hunk
• Sprain relief
• ''Wozzeck'' composer
• Titanic downfall?
• Ache soother
• Hazard to navigation