右脳[unou] right brain
健脳剤[kennouzai] brain tonic
左脳[sanou] left brain
主脳者[shunousha] head
主脳[shunou] head

主脳会談[shunoukaidan] leadership conference
小脳[shounou] cerebellum
樟脳[shounou] camphor
人工頭脳[jinkouzunou] cybernetics
洗脳[sennou] brainwashing

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