Nemeses

The farmer's nemeses were the locusts that ate his crops year after year.

The journalist's nemeses, the lack of reliable sources and conflicting information, made it hard for her to report the truth.

The hero and villain in the action movie were nemeses.

The homeowner's nemeses, termites, caused extensive damage to the structure of their house.

His stubbornness was one of his nemeses that often led to arguments with his loved ones.