頓て[yagate] before long
整頓[seiton] orderliness
停頓[teiton] deadlock
頓死[tonshi] sudden death
頓着無い[tonchakunai] indifferent

頓珍漢[tonchinkan] absurdity
無頓着[mutonchaku] indifferent
素っ頓狂[suttonkyou] wild
頓着[tonchaku] being concerned about or mindful of

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