Related Clues:

• Butaritari, for one
• Bikini Island, e.g.
• Anchor ring
• Donut, mathematically
• Ringlike coral island
• Bikini, for one
• Lagoon surrounder
• Bagel, topologically
• Ring-shaped reef
• Reef ring
• Nauru, for one
• Circle at sea
• Island-hopper's stop
• Lagoon encloser
• Coral reef