泳ぐ[oyogu] to swim
泳法[eihou] swimming style
遠泳[enei] long-distance swimming
横泳ぎ[yokooyogi] sidestroke (swim.)
競泳[kyouei] swimming race

水泳[suiei] swimming
側泳[sobaei] side stroke
背泳ぎ[seoyogi] backstroke (swim.)
平泳ぎ[hiraoyogi] breaststroke (swimming)
力泳[rikiei] powerful swimming

井の中の蛙大海を知らず[inonakanokawazutaikaiwoshirazu] parochial
雨蛙[amagaeru] tree frog (esp. the Japanese tree frog, Hyla japonica)
蛙の子は蛙[kaerunokohakaeru] like father, like son
蛙跳び[kaerutobi] (game of) leapfrog
殿様蛙[tonosamagaeru] black-spotted pond frog (Rana nigromaculata)

蟇蛙[hikigaeru] toad (esp. the Japanese toad, Bufo japonicus)
蛙又[kaerumata] curved wooden support on top of the main beam of a house, now mainly decorative (shape evocates an open-legged frog)
青蛙[aogaeru] green (tree) frog
赤蛙[akagaeru] any brown or reddish-brown frog (esp. of family Ranidae)