The phrase "with us" can be replaced by a variety of synonyms, each providing a slightly different connotation. "Alongside us" emphasizes a collaborative effort, while "beside us" suggests support or assistance. "By our side" implies a strong partnership or loyalty, while "in conjunction with us" highlights cooperation and coordination. "Among us" implies inclusion and a sense of belonging, while "in our company" conveys a level of formality. "Together with us" emphasizes unity and teamwork, while "in unison with us" suggests synchronization and harmony. Overall, there are many ways to express the idea of being together or working alongside someone.