The expression "worked on" is commonly used to describe the process of making improvements to something or collaborating on a project. However, there are numerous words and phrases that can be used to convey similar meanings. Some possible synonyms for "worked on" may include "collaborated with," "contributed to," "participated in," "engaged in," "assisted with," "aided in," "contributed toward," "supported," or "played a role in." Each of these phrases emphasizes the idea of actively contributing to a task or project, suggesting a sense of collaboration, cooperation, and involvement. By choosing a specific synonym based on context and tone, writers can add variety and nuance to their language.