御湯[oyu] hot water
塩湯[shioyu] hot salt water (incl. bath)
温湯[ontou] comfortably hot bath
下湯[shimoyu] sitz bath
そと湯[sotoyu] open air bath (in an inn, onsen, etc.)

給湯[kyuutou] hot-water supply
給湯器[kyuutouki] hot-water heater
腰湯[koshiyu] sitting bath
重湯[omoyu] thin rice gruel
出で湯[ideyu] hot spring

淫蕩[intou] dissipation
春風駘蕩[shunpuutaitou] warm and genial spring weather
震蕩[shintou] shock
掃蕩[soutou] cleaning up
放蕩[houtou] dissipation

遊蕩[yuutou] self-indulgent pleasure
蕩す[tarasu] to cajole
蕩ける[torokeru] to melt (to a liquid)
見蕩れる[mitoreru] to be fascinated (by)
蕩尽[toujin] squandering