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

葵祭[aoimatsuri] hollyhock festival
菟葵[isoginchaku] sea anemone
向日葵[himawari] sunflower (Helianthus annuus)
山葵[wasabi] wasabi (Japanese horseradish)
立ち葵[tachiaoi] hollyhock (Alcea rosea)

山葵漬[wasabizuke] pickled Japanese horseradish
花葵[hanaaoi] hollyhock
天竺葵[tenjikuaoi] geranium
銭葵[zeniaoi] common mallow (Malva sylvestris var. mauritiana)