backstroke

from WordNet (r) 3.0 (2006)

backstroke
    n 1: a swimming stroke that resembles the crawl except the
         swimmer lies on his or her back
    v 1: swim on one's back

from The Collaborative International Dictionary of English v.0.48

backstroke \back"stroke`\ n.
   1. a swimming stroke that resembles the crawl except the
      swimmer lies on his or her back. It is usually executed
      with backward-moving circular arm strokes and a flutter
      kick.
      [WordNet 1.5]

from Moby Thesaurus II by Grady Ward, 1.0

38 Moby Thesaurus words for "backstroke":
      Australian crawl, Long Melford, aquaplaning, aquatics, backhand,
      backhander, balneation, bathe, bathing, bolo punch, breaststroke,
      butterfly, crawl, diving, dog paddle, fin, fishtail, flapper,
      flipper, floating, haymaker, hook, natation, one-two,
      round-arm blow, roundhouse, short-arm blow, sidestroke, sidewinder,
      surfboarding, surfing, swim, swimming, swing, treading water,
      uppercut, wading, waterskiing

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