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Noun: air cushion
  1. The trapped air that supports a hovercraft a short distance above the water or ground
  2. A mechanical device using confined air to absorb the shock of motion
    - air spring
  3. A cushion usually made of rubber or plastic that can be inflated
    - inflatable cushion

Derived forms: air cushions

Type of: compressed air, cushion, damper, shock, shock absorber