What is another word for ring-binder?
Pronunciation: [ɹˈɪŋbˈa͡ɪndə] (IPA) 
Ring-binders are essential office stationery items used to store and organize papers, documents, and notes. However, there is a host of alternative terms for ring-binder, many of which could be used interchangeably. Some popular synonyms include folder, file, binder, three-ring binder, loose-leaf binder, portfolio, or notebook. Additionally, some binders may be referred to by their shape, such as D-ring binder or O-ring binder. Regardless of the term used, these items serve as effective tools for keeping important documents and notes in order, aiding in productivity, and improving organization.
