その都度[sonotsudo] each time it happens
旧都[kyuuto] the old capital
京都市[kyoutoshi] Kyoto (city)
京都府[kyoutofu] Kyoto (metropolitan area)
古都[koto] ancient city

好都合[koutsugou] convenient
三大都市[sandaitoshi] the three largest cities
姉妹都市[shimaitoshi] sister cities
主要都市[shuyoutoshi] major city
首都[shuto] capital city

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