The terms "collaborate" and "teammate" are related but not synonyms or antonyms.

• "Teammate" refers to a person who is a member of the same team as someone else.
• "Collaborate" means to work jointly with others, often in an intellectual or cooperative effort.

The relationship between the two is that teammates collaborate with each other. Teammates are individuals who belong to the same team, and collaboration is the process through which they work together to achieve common goals. Thus, teammates often collaborate as part of their team activities.