A formatter is an essential tool that facilitates the process of formatting documents. In simple terms, a formatter enables users to format documents in different styles and formats. Some synonyms that can be used interchangeably with the word 'formatter' include editor, converter, compiler, stylist, and designer. An editor is responsible for proofreading and making changes to a document for better readability. A converter is a tool that converts one file format to another, making it easier to read and understand. A compiler is responsible for compiling code to create a program. A stylist ensures that a document's visuals are appealing, while a designer ensures that a document is aesthetically pleasing. In short, all these synonyms revolve around formatting documents.