When it comes to finding synonyms for "activities manager," there are a few options to consider. One alternative could be "recreation leader," which suggests an individual who is responsible for organizing and leading various activities for a group of people. Another option might be "program coordinator," which highlights the role of overseeing and managing programs and events. Additionally, "event planner" could also be a suitable alternative, particularly in cases where the focus is on organizing and executing specific events or gatherings. Ultimately, the specific synonym that is most appropriate will depend on the context and specific responsibilities of the individual in question.