Antonyms for the phrase "bumped heads with" could include getting along, harmonizing, cooperating, collaborating, and agreeing. Instead of experiencing conflict or disagreement, individuals who get along with each other are able to work together seamlessly, respect one another's opinions, and foster positive relationships. Harmony, on the other hand, involves a state of peaceful coexistence where everyone is able to express themselves and be heard. Collaborating and cooperating also involve working together towards a common goal, without getting into arguments or conflicts. Ultimately, finding antonyms for "bumped heads with" involves creating an environment where everyone can work together confidently and harmoniously without any issues.