troposphere

from WordNet (r) 3.0 (2006)

troposphere
    n 1: the lowest atmospheric layer; from 4 to 11 miles high
         (depending on latitude)

from Moby Thesaurus II by Grady Ward, 1.0

45 Moby Thesaurus words for "troposphere":
      Appleton layer, CAT, F layer, Heaviside-Kennelly layer,
      Van Allen belt, aerospace, aerosphere, air hole, air pocket,
      airspace, belt, bump, ceiling, chemosphere, crosswind, empty space,
      favorable wind, fog, front, head wind, high-pressure area, hole,
      ionosphere, isothermal region, jetstream, layer, low-pressure area,
      lower atmosphere, outer atmosphere, overcast, photosphere, pocket,
      roughness, soup, space, stratosphere, stratum, substratosphere,
      tail wind, tropopause, trough, turbulence, upper atmosphere,
      visibility, visibility zero