Lamborghini is the main rival for Ferrari.
Their main rival is Manchester United
The name of Edison's main rival was Nikola Tesla.
The main rival of FC Schalke is Borussia Dortmund.
The main staple of the Iroquois and Huron Indians was corn(mais).
Chargers
England is Australia's main rival at the World Championships and Commonwealth Games.
The main rival now is Alabama. Following that would be Auburn.
Spain was their main adversary
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the deer and the corn
Assyria