The phrase "be business" can mean to act professionally or to focus on tasks related to work. There are several synonyms for this phrase that can be used, including: be serious, be professional, be productive, be efficient, be diligent, be focused, be attentive, be hardworking, be disciplined, and be dedicated. Each of these words can convey the idea of taking one's work seriously and being committed to success. Using these synonyms can help to emphasize the importance of being focused and efficient when completing work-related tasks. Whether in the office or working remotely, it is essential to stay motivated and stay on task in order to achieve success in business.