P/N is an acronym that stands for "part number," but sometimes it can be helpful to use synonyms to avoid repeating the same phrase over and over again. One option could be to simply use "part code" or "product code" instead. Another synonym for P/N is "item number," which is often used interchangeably with part numbers in documentation or inventory management systems. Similarly, "catalog number" or "reference number" can also be used as synonyms for P/N. Alternatively, using the manufacturer's product name or description in place of P/N can also convey the same information while avoiding the use of technical jargon.