1) Swimming 
swimming
• (n.) The act of floating on the water; swimming. • (n.) The act of floating on the water; swimming.
Na·ta'tion noun [ Latin natatio , from natare to swim: confer French natation . See Natant .] The act of floating on the water; swimming. Sir T. Browne. 
natant, natation, natatorial 1. The act or art of swimming or floating on water. 2. Adapted for swimming.
an act or the skill of swimming.
the act of someone who swims or floats in the water