Nemeses

The roadrunner and coyote were nemeses in the cartoon.

The cat and mouse were nemeses in the classic cartoon.

The computer virus was the nemeses of the company's entire network.

Procrastination was one of his nemeses when it came to completing assignments on time.

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

The nemeses of computer hackers are the cybersecurity experts who work to keep their networks safe.

The traveler's nemeses, lost luggage and delayed flights, ruined her vacation.

The hero and his nemeses had a fierce battle that lasted for days.