The Collaborative International Dictionary of English v.0.48:

Cushion \Cush"ion\ (k[oo^]sh"[u^]n), v. t. [imp. & p. p.
   Cushioned (-[u^]nd); p. pr. & vb. n. Cushioning.]
   1. To seat or place on, or as on a cushion.
      [1913 Webster]

            Many who are cushioned on thrones would have
            remained in obscurity.                --Bolingbroke.
      [1913 Webster]

   2. To furnish with cushions; as, to cushion a chaise.
      [1913 Webster]

   3. To conceal or cover up, as under a cushion.
      [1913 Webster]

   Cushioned hammer, a dead-stroke hammer. See under
      Dead-stroke.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

cushioned \cushioned\ (k[oo^]sh"[u^]nd), adj.
   1. furnished with a cushion or other device to reduce
      hardness.

   Syn: cushiony, padded.
        [WordNet 1.5 +PJC]

   2. having the severity reduced; having the unpleasant effects
      mitigated.
      [PJC]

   3. protected against shock by adding soft padding or other
      device to reduce deceleration in a collision.

   Syn: cushioned.
        [PJC]

WordNet (r) 3.0 (2006):

cushioned
    adj 1: softened by the addition of cushions or padding [syn:
           cushioned, cushiony, padded]

Moby Thesaurus II by Grady Ward, 1.0:

24 Moby Thesaurus words for "cushioned":
   comfortable, comfy, commodious, contented, convenient, cozy,
   cushiony, cushy, easeful, easy, friendly, homelike, homely, homey,
   lived-in, luxurious, peaceful, relaxing, reposeful, restful, roomy,
   snug, soft, warm