PDF or Portable Document Format is a popular file format for documents that can be easily shared and viewed on different devices. While PDF is widely used, there are other synonyms that also refer to the same format. Some common synonyms for PDF include electronic document, digital manuscript, e-book, and electronic publication. These synonyms are often used interchangeably, especially in technical and academic contexts. Additionally, there are other file formats that are similar to PDF, such as DOCX, ODT, and RTF, although they may not provide the same level of compatibility and versatility as PDF. Regardless of the term used, PDF remains a reliable format for sharing, saving, and printing documents.