There are numerous alternatives for the term "related activity". Some possible synonyms include "associated operation", "linked task", "corresponding undertaking", "interconnected function", "interlinked behavior", "relevant pursuit", "connected event", "affiliated performance", "tied involvement", and "correlative duty". These words denote actions or tasks that are connected or associated with each other in some way, and often exist within the same larger context. Whether describing work functions, hobbies, sports, or any other sort of activity, these terms offer a more varied and nuanced way of expressing the idea of something being connected or linked to another action.