Cooperate is a term that has a wide variety of synonyms. These words can be used interchangeably in many sentences, depending on the context in which they are used. Some of the synonyms for "cooperate" include work together, collaborate, join forces, team up, unite, amalgamate and ally. These synonyms can be used to describe the process by which two or more people or groups work together to achieve a common goal, or to describe the outcome of such cooperation. Regardless of which word is used, the ultimate goal is to promote teamwork and collaboration in order to achieve success and create a positive outcome.