鎌止め[kamadome] cutting grass and trees is prohibited
鎌首[kamakubi] sickle-shaped neck (e.g. snake, praying mantis)
鎌倉時代[kamakurajidai] Kamakura period (1185-1333 CE)
鎌足[kamaashi] legs bowed in
鎌鼬[kamaitachi] type Japanese folkloric monster (yokai), thought to be a trio of weasels who appear in a whirlwind to cut their victim

鎌切[imojiri] praying mantis (esp. the narrow-winged mantis, Tenodera angustipennis)
鎌形[kamagata] sickle-shaped
鎖鎌[kusarigama] sickle and chain (weapon)
鎌をかける[kamawokakeru] to trick someone (into confirming or revealing the truth)

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