Loose leaf notebooks, also known as binder notebooks or ring binders, offer a versatile and organized way to store and organize notes, projects, and documents. There are a few synonyms for loose leaf notebooks that you may come across, including three-ring binder, dossier, notepad portfolios, and refillable notebooks. Three-ring binders are a popular synonym, as they use rings to hold pages securely in place. Dossier is a commonly used term in professional settings, as it refers to a collection of documents and information related to a particular subject or case. Notepad portfolios and refillable notebooks are often used in academic settings, as they can be easily refilled and customized to fit specific needs.