Related Clues:

• Newman, to Seinfeld
• The Axis, once
• Sentry's word
• Destroy completely
• Be in competition with
• Most difficult foe
• Hostile state
• The other guys
• Machu Picchu, for one
• Axis, to the Allies
• Place of archaeological interest
• Archaeology sight
• Arch-enemy
• One who isn't behind you
• Threaten to surpass