悪水[akusui] undrinkable water
井戸水[idomizu] well water
一衣帯水[ichiitaisui] (being separated only by a) narrow strip of water
一水[issui] current (of water)
溢水[issui] inundation

飲水量[insuiryou] amount of drinking
飲料水[inryousui] drinking water
烏の行水[karasunogyouzui] quick bath
雲水[unsui] itinerant priest
塩化水素[enkasuiso] hydrogen chloride

引っ張り蛸[hipparidako] being very popular
茹で蛸[yudetako] octopus (boiled)
蛸焼き[takoyaki] octopus dumplings
蛸入道[takonyuudou] octopus
蛸坊主[takobouzu] man with a bald or shaven head

蛸足[takoashi] many-legged
蛸足配線[takoashihaisen] overloading an electrical circuit
蛸配当[takohaitou] bogus dividend
蛸壺[takotsubo] octopus pot