swimmer
NounWordNet 3.0
Webster's Dictionary (GCIDE)
Swimmer \Swim"mer\, n.
1.One who swims. [1913 Webster]
2.(Far.) A protuberance on the leg of a horse. [1913 Webster]
3.(Zool.) A swimming bird; one of the natatores. [1913 Webster]
Little swimmer (Zool.), a phalarope. [1913 Webster]