backstroke

• POS: Noun, Verb (intransitive)
• HYPHEN: back=stroke

CIDE DICTIONARY

backstroke, n. 

 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]

OXFORD DICTIONARY

backstroke, n. a swimming stroke performed on the back with the arms lifted alternately out of the water in a backward circular motion and the legs extended in a kicking action.

THESAURUS

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