The Collaborative International Dictionary of English v.0.48:

Bush \Bush\, v. t. [imp. & p. p. Bushed (b[.u]sht); p. pr. &
   vb. n. Bushing.]
   1. To set bushes for; to support with bushes; as, to bush
      peas.
      [1913 Webster]

   2. To use a bush harrow on (land), for covering seeds sown;
      to harrow with a bush; as, to bush a piece of land; to
      bush seeds into the ground.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bushing \Bush"ing\, n. [See 4th Bush.]
   1. The operation of fitting bushes, or linings, into holes or
      places where wear is to be received, or friction
      diminished, as pivot holes, etc.
      [1913 Webster]

   2. (Mech.) A bush or lining; -- sometimes called a thimble.
      See 4th Bush.
      [1913 Webster]

WordNet (r) 3.0 (2006):

bushing
    n 1: an insulating liner in an opening through which conductors
         pass
    2: a cylindrical metal lining used to reduce friction [syn:
       bushing, cylindrical lining]

Moby Thesaurus II by Grady Ward, 1.0:

34 Moby Thesaurus words for "bushing":
   backing, ball bearing, bearing, bevel bearing, bush, chassis,
   doubling, doublure, facing, filler, filling, frame, headstock,
   infrastructure, inlay, inlayer, insole, interlineation, jewel,
   liner, lining, mount, mounting, needle bearing, packing, padding,
   roller bearing, setting, skeleton, stuffing, thrust bearing,
   underframe, wadding, wainscot