teammate
nounUK /ˈtiːm.meɪt/
US /ˈtiːm.meɪt/
A teammate is a person who plays or works on the same team as you.
My teammate passed me the ball, and I scored a goal.
OTHER MEANINGS
2. A person who works with you on a shared project at school or work.
She is my teammate on the science project.
3. A fellow member of a group that competes together in a game or sport.
Every teammate cheered when our team won the match.
4. A person who supports and helps you reach a shared goal.
A good teammate always helps others learn the rules.