There are a few potential synonyms that could be used for the term "peritoneal dialysis." One option might be abdominal dialysis, as this process involves using the peritoneal membrane within the abdomen to filter waste and fluids from the body. Another possibility could be "PD" for short, as this is a common abbreviation for peritoneal dialysis within medical settings. Some other phrases that might be used to describe peritoneal dialysis could include abdominal port dialysis or simply "dialysis via the peritoneum." Ultimately, the specific phrasing used will depend on the context in which it is being discussed and the audience for whom the discussion is intended.