The antonyms for "am on a team" are many, and they include "not on a team," "solo," "independent," "alone," "unconnected," and "isolated." While being on a team can provide many advantages, such as the ability to share ideas, support, and experience when working towards a common goal, individuals who are not on a team can still be successful. However, these individuals often have to rely solely on their own abilities to achieve their goals, which can be challenging. Being on a team can provide a sense of belonging and camaraderie, which may not be present when working solo. Ultimately, the choice of whether or not to be on a team depends on individual circumstances and preferences.