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

A swallow hole

• airframes
• air freight
• air-freight
• air-freighted
• air-freighting
• air freights
• air-freights
• air frost
• airgap
• airgaps
• air-gas
• airglow
• airglows
• airgraph
• airgraphs
• air-grating
• air-gratings
• air guitar
• air guitars
• airgun
• airhead
• airheads
• air hockey
• airhole
• airholes