刎死[funshi] decapitating oneself
刎頸[funkei] decapitation
刎ね上がる[haneagaru] to jump up

刎ねる[haneru] to hit (e.g. to have a car hit someone)
自刎[jifun] committing suicide by slitting one's throat

頸静脈[keijoumyaku] jugular vein
頸動脈[keidoumyaku] carotid artery
頸肉[keiniku] neck flesh
子宮頸[shikyuukei] uterine cervix
手頸[tekubi] wrist

頸っ丈[kubittake] deeply in love with
頸筋[kubisuji] nape of the neck
頸飾り[kubikazari] necklace
鼠頸部[sokeibu] groin
足頸[ashikubi] ankle