1. A fellow-rival.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• corival,
• Corivel,
• xo-rival,
• vo-rival,
• fo-rival,
• do-rival,
• ci-rival,
• ck-rival,
• cl-rival,
• cp-rival,
• c0-rival,
• c9-rival,
• co-eival,
• co-dival,
• co-fival,
• co-tival,
• co-5ival,
• co-4ival,
• co-ruval,
• co-rjval

The adjective form of the word "co-rival" is "co-rivalrous".

The plural form of "co-rival" is "co-rivals"

The singular form of the word "co-rival" is "co-rival".