When describing a relationship between two entities, one may use the phrase "in partnership". However, there are several synonyms that can be used interchangeably when referring to this type of relationship. These include, but are not limited to, collaborative, allied, cooperative, united, joint, and working together. In partnership implies a close relationship where mutual goals and efforts are shared, while collaborative highlights working together towards a common objective. Allied and united convey a sense of solidarity and joining forces, while cooperative emphasizes willingness to work together. Joint often connotes equal responsibility and shared resources, and working together conveys a sense of coordination and teamwork. Overall, these synonyms highlight the importance of teamwork and mutual benefit in any partnership.