Nemeses

The roadrunner and coyote were nemeses in the cartoon.

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

The cat and mouse were nemeses in the classic cartoon.

Poor time management was one of his nemeses that hindered his productivity.

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

Financial struggles and debt were his nemeses for many years.