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

悪相[akusou] evil countenance
位相[isou] phase (in science)
位相幾何学[isoukikagaku] topology
位相空間[isoukuukan] phase space (physics)
為替相場[kawasesouba] exchange rates

遺産相続[isansouzoku] inheritance
一子相伝[isshisouden] transmission of the secrets of an art, craft, trade or learning from father to only one child
印相[inzou] mudra
運輸相[unyushou] Transport Minister
卸相場[oroshisouba] wholesale price

一首[isshu] tanka
鎌首[kamakubi] sickle-shaped neck (e.g. snake, praying mantis)
丸首[marukubi] round-necked (T-shirt)
偽首[nisekubi] falsified severed head
カリ首[karikubi] (something resembling a) goose's neck

がん首[gankubi] head of a pipe, incl. the bowl and stem attachment
機首[kishu] nose (of plane)
襟首[erikubi] nape of neck
元首[genshu] ruler
絞首刑[koushukei] death by hanging