The term "agenda book" refers to a notebook or planner that is used to keep track of appointments, tasks, and deadlines. Some synonyms that can be used for this term include calendar book, day planner, diary, organizer, datebook, and schedule book. These terms all refer to a similar concept of a tool used for planning and organization of one's time and tasks. Each synonym may have slight variations in its formatting or design, but they all serve the same purpose of helping individuals stay on schedule and achieve their goals. Regardless of the terminology used, an agenda book is an essential tool for anyone looking to stay organized and focused in their daily life.