| Ruins |
| Banes |
| Rivals |
| Avengers |
| Waterloos |
| Archrivals |
| Archenemies |
| Tough rivals |
| Arch enemies |
| Fearsome foes |
| Fighting types |
| Formidable foes |
| Tough opponents |
| Fierce opponents |
| Agents of undoing |
| Unbeatable rivals |
| Formidable rivals |
| Archenemies, maybe |
| They're unbeatable |
| They can't be beat |
| You can't beat them |
| Thorns in one's side |
| They can't be beaten |
| Unbeatable opponents |
| Formidable opponents |
| Plan foilers, perhaps |
| They're unconquerable |
| Agents of retribution |
| Bond and Blofeld, e.g. |
| They give comeuppances |
| Unbeatable archenemies |
| Superheroes, to villains |
| Holmes and Moriarty, e.g. |
| Inflicters of retribution |
| Usually unbeatable rivals |
| Those imposing retribution |
| Luthor and Zod, to Superman |
| The Ravens, to the Steelers |
| The Steelers, to the Ravens |
| Joker and Riddler, to Batman |
| Batman and Robin, to Catwoman |
| Rivals to who one always loses |
| Batman and Superman, to villains |
| Luthor and Brainiac, to Superman |
| Like Batman and Robin to the Joker |
| Harry Potter and Lord Voldemort, e.g. |
| Sinestro and Professor Zoom, in their respective universes |