The Collaborative International Dictionary of English v.0.48:

Bracken \Brack"en\, n. [OE. braken, AS. bracce. See 2d Brake,
   n.]
   A brake or fern. --Sir W. Scott.
   [1913 Webster]

WordNet (r) 3.0 (2006):

bracken
    n 1: fern of southeastern Asia; not hardy in cold temperate
         regions [syn: bracken, Pteridium esculentum]
    2: large coarse fern often several feet high; essentially weed
       ferns; cosmopolitan [syn: bracken, pasture brake,
       brake, Pteridium aquilinum]

Moby Thesaurus II by Grady Ward, 1.0:

54 Moby Thesaurus words for "bracken":
   algae, autophyte, bean, brown algae, climber, conferva, confervoid,
   creeper, diatom, fern, fruits and vegetables, fucus, fungus,
   grapevine, green algae, gulfweed, herb, heterophyte, ivy, kelp,
   legume, lentil, liana, lichen, liverwort, mold, moss, mushroom,
   parasite, parasitic plant, pea, perthophyte, phytoplankton,
   planktonic algae, plant families, puffball, pulse, red algae,
   rockweed, rust, saprophyte, sargasso, sargassum, sea lentil,
   sea moss, sea wrack, seaweed, smut, succulent, toadstool, vetch,
   vine, wort, wrack



U.S. Gazetteer Counties (2000):

Bracken -- U.S. County in Kentucky
   Population (2000):    8279
   Housing Units (2000): 3715
   Land area (2000):     203.218425 sq. miles (526.333281 sq. km)
   Water area (2000):    5.674273 sq. miles (14.696299 sq. km)
   Total area (2000):    208.892698 sq. miles (541.029580 sq. km)
   Located within:       Kentucky (KY), FIPS 21
   Location:             38.731039 N, 84.080939 W
   Headwords:
    Bracken
    Bracken, KY
    Bracken County
    Bracken County, KY