Nemeses

Superman and Lex Luthor were arch nemeses in the comic book.

The superhero's nemeses were constantly coming up with new plans to defeat him.

The superhero and supervillain in the comic book were nemeses.

Her addiction to alcohol was one of her nemeses.

The nemeses of clean energy are the fossil fuel industries that have long dominated the world's energy production.

The detective and his nemeses engaged in a cat-and-mouse game that lasted for years.

The nemeses of the detective were always trying to outsmart him.

Writer's block and self-doubt were his nemeses when it came to writing.