dolina /dō-lēˈnə/ or doline /dō-lēnˈ/ (geology)

A swallow hole

• surface-vessels
• surface water
• surface wind
• surface winds
• surface worker
• surface workers
• surfacing
• surfacings
• surfactant
• surfactants
• surf-bather
• surf-bathers
• surf-bathing
• surfbird
• surfbirds
• surfboard
• surfboarding
• surfboards
• surf boat
• surf boats
• surf canoe
• surf canoes
• surfcaster
• surfcasters
• surfcasting