Relay teammate refers to an athlete who runs an assigned distance in a relay race and passes a baton to their teammate to continue the race. Some synonyms for relay teammate include relay runner, relay participant, relay competitor, and relay partner. These terms are often used interchangeably to describe an individual who plays an important role in the success of their relay team. In addition, terms such as team player, collaborator, and contributor can also be used to describe relay teammates. These synonyms highlight the importance of teamwork, communication, and trust in a relay race, where each member of the team must work together to achieve a common goal.