Possible Clues:

• Kill __ killed
• 'Eat ___ eaten' (law of the jungle)
• Kill ___ killed
• Kill-killed connector
• 'Kill -- killed!'
• "... there — square"
• Kill -- killed
• "Eat ___ eaten" (law of the jungle)
• Eat-eaten link
• 'Awake, arise ___ forever fallen!': Milton