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

鳩合[kyuugou] rally
軍用鳩[gunyoubato] carrier pigeon
伝書鳩[denshobato] carrier pigeon
鳩舎[kyuusha] pigeon house
鳩尾[mizuochi] pit of the stomach

鳩首[kyuushu] going into a huddle
鳩派[hatoha] doves
鳩胸[hatomune] pigeon chest (Pectus carinatum, deformity of the chest, protruding ribs and sternum)
斑鳩[ikaru] Japanese grosbeak (Eophona personata)