一元[ichigen] unitary
一元化[ichigenka] unification
一元的[ichigenteki] monistic
一元論[ichigenron] monism
一次元[ichijigen] one dimensional

一新紀元[isshinkigen] new era
隠元[ingen] beans
隠元豆[ingenmame] common bean (Phaseolus vulgaris)
家元[iemoto] head of a school (of music, dance)
火の元[hinomoto] origin of fire

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

往還[oukan] traffic
還元[kangen] resolution
還俗[genzoku] return to secular life
還流[kanryuu] return current
還暦[kanreki] 60th birthday

還す[kaesu] to send (someone) back
還り[kaeri] return
還る[kaeru] to return
饋還[kikan] repatriation
強制送還[kyouseisoukan] forced repatriation

飴玉[amedama] candy
飴坊[amenbo] pond skater (any insect of family Gerridae)
綿飴[wataame] cotton candy
飴色[ameiro] amber
飴細工[amezaiku] candy fashioned in human and animal forms

飴ん棒[amenbou] stick of candy
飴煮[ameni] food boiled in sugared broth
水飴[mizuame] starch syrup
晒し飴[sarashiame] sweet rice jelly