What is a synonym for "archrival"?

Common synonyms include: archenemies, nemesis.

How do you pronounce "archrival"?

Pronounced //ɑː(ɹ)t͡ʃˈɹaɪvəl//.

/ɑː(ɹ)t͡ʃˈɹaɪvəl/ noun

noun ·Rare ·Advanced level

Noun

1
A chief rival.
"The New York Yankees are playing their archrival the Boston Red Sox tonight."

"The New York Yankees are playing their archrival the Boston Red Sox tonight."

From arch- + rival.