開襟シャツ[kaikinshatsu] open-collared shirt
共襟[tomoeri] same-colored neckband (coloured)
胸襟[kyoukin] one's heart
襟巻[erimaki] muffler
襟巻き蜥蜴[erimakitokage] frilled lizard (Chlamydosaurus kingii)

襟元[erimoto] front of neck
襟首[erikubi] nape of neck
襟足[eriashi] nape of neck
襟髪[erigami] scruff of neck
半襟[haneri] quality collar for an under kimono

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