archrivals
/ˈɑːrtʃˌraɪvəlz/
noun
- Plural of archrival; main competitors or enemies of each other.
- The two companies have been archrivals in the smartphone market for years.
- The archrivals from different schools finally settled their dispute during the debate.
- In the final match, the archrivals faced off for the championship title.
Antonyms