Related Clues:

• Rival bands
• Hatfields, to McCoys
• G.I. Joe and Cobra Commander, e.g
• Hamilton and Burr, notably
• The Hatfields and the McCoys, e.g
• Poison Ivy and Mr. Freeze, to Batman
• Yankees and Red Sox, e.g
• Alexander Hamilton and Aaron Burr, e.g
• They're not on the same page
• The Hatfields, to the McCoys
• Hamilton and Burr, e.g
• Loki and Thor, e.g
• Friends' opposite
• Krystle and Alexis on the 1980s 'Dynasty,' e.g
• Krystle and Alexis on the 1980s "Dynasty," e.g