cochampion

/koʊˈtʃæmpiən/
noun
  1. A person who shares a championship title with another person, especially in a competition or contest.
    • The judges awarded the prize to both artists, making them cochampions of the painting competition.
    • The two runners finished the race at exactly the same time and were declared cochampions.
    • She and her doubles partner became cochampions of the tennis tournament.
Synonyms