Denshi Jisho — Online Japanese dictionary

踵 かかと heel (of foot, shoe, stocking, etc.)
Common word, Noun, Usually written using kana alone 
踵 あくと heel (of foot, shoe, stocking, etc.)
Noun, Usually written using kana alone 
踵 きびす heel (of foot, shoe, stocking, etc.)
Noun, Usually written using kana alone 
踵 くびす heel (of foot, shoe, stocking, etc.)
Noun, Usually written using kana alone 
頚筋 くびすじ nape of the neck; back of the neck; scruff of the neck
Noun 
頸筋 くびすじ nape of the neck; back of the neck; scruff of the neck
Noun 
首筋 くびすじ nape of the neck; back of the neck; scruff of the neck
Noun 
首すじ くびすじ nape of the neck; back of the neck; scruff of the neck
Noun 
踵骨 しょうこつ calcaneus; calcaneum; heel bone
Noun 
踵を返す きびすをかえす to turn back; to return
Expression, Godan verb with su ending 
踵を返す くびすをかえす to turn back; to return
Expression, Godan verb with su ending 
くびすを返す くびすをかえす to turn back; to return
Expression, Godan verb with su ending 
首筋を違える くびすじをちがえる to wrench one's neck
Expression, Ichidan verb 

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