Possible Questions:
- Ruin
- Curse
- Foe
- Bane
- Retribution
- Moriarty, to Holmes
- Unconquerable foe
- Unbeatable foe
- Formidable foe
- Archenemy
- Yankees, to the Red Sox
- Waterloo
- Unbeatable rival
- The Riddler, to Batman
- Superman, to Lex Luthor
- Lex Luthor, to Superman
- Formidable rival
- Arch enemy
- Wellington, to Napoleon
- Old enemy
- Greek goddess of vengeance
- "Star Trek: ___"
- Very tough thing to lick
- Vengeance deified
- Unbeatable scourge
- Newman, to Jerry Seinfeld
- Ness vis-à-vis Capone
- Macduff, to Macbeth
- Lifelong foe
- Just punishment
- Goddess of righteous anger
- Bête noire's relative
- Batman, to the Riddler
- Batman, to the Joker
- 2002's "Star Trek: ___"
- 1989 Isaac Asimov book