The Collaborative International Dictionary of English v.0.48:

fetterbush \fet"ter*bush`\ n.
   1. An ornamental evergreen shrub (Pieris floribunda) of the
      Southeastern U. S. having small white bell-shaped flowers.

   Syn: mountain fetterbush, mountain andromeda, Pieris
        floribunda.
        [WordNet 1.5]

   2. A showy evergreen shrub (Lyonia lucida) of the
      Southeastern U. S. with shiny leaves and angled branches
      and umbel-like clusters of pink to reddish flowers.

   Syn: fetter bush, shiny lyonia, Lyonia lucida.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

fetterbush
    n 1: ornamental evergreen shrub of southeastern United States
         having small white bell-shaped flowers [syn: fetterbush,
         mountain fetterbush, mountain andromeda, Pieris
         floribunda]
    2: showy evergreen shrub of southeastern United States with
       shiny leaves and angled branches and clusters of pink to
       reddish flowers that resemble an umbel [syn: fetterbush,
       fetter bush, shiny lyonia, Lyonia lucida]