"Sewed up" is a commonly used phrase that refers to the completion of a task or the achievement of a goal in an efficient and effective manner. However, there are several synonyms that can be used to convey the same meaning. One such synonym is "wrapped up", which implies that the task has been finished and is now ready for delivery or consumption. Others include "finished", "completed", "accomplished", and "achieved". These all describe a state of successful conclusion, indicating that the work has been done thoroughly and to a high standard. Different synonyms can be used to suit different contexts and emphasize the degree of success achieved.