The word "pipage" refers to a system of pipes or a network of conduits used for transporting fluids or gases. Some synonyms for this term include pipeline, channel, conduit, and tubing. Other related words might include piping, which refers specifically to the pipes themselves, or ducting, which can be used to describe larger systems of air or fluid movement. Depending on the context, there may be more specific terms that can be used to describe the type of pipage being referred to, such as plumbing, irrigation, or oil pipelines. Overall, the term "pipage" is just one of many possible ways to describe a system of pipes or conduits.