The phrase "are on one case" suggests that a group of individuals is focused on a specific task or assignment. Antonyms for this phrase might include "unfocused," "scattered," or "disorganized." If a group is not "on one case," they may be distracted by multiple tasks or lacking a clear direction. Another antonym could be "inattentive," which implies a lack of interest or engagement with the task at hand. In contrast, being "on one case" implies a sense of purpose and dedication to completing a shared goal. By understanding the antonyms for this phrase, you can identify when a group is lacking focus and assess ways to improve their productivity.