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

魁偉[kaii] brawny
渠魁[kyokai] ringleader
首魁[shukai] forerunner

華魁[oiran] courtesan
花魁道中[oirandouchuu] procession of courtesans
容貌魁偉[youboukaii] (a man) having a commanding face and a powerful physique