air cushion

/EH1 R K UH1 SH AH0 N/
noun
  1. 1

    A layer of trapped air that supports a hovercraft.

  2. 2

    A shock absorber that uses an air chamber.

  3. 3

    A rubber or plastic inflatable cushion.

Source: https://en.wiktionary.org/wiki/air%20cushion