When looking for synonyms for "hardbacked," one might consider alternatives like "hardcover," "cased," or "bound." These terms all refer to a book or publication that has a rigid, sturdy cover made of a durable material like cardboard or leather. Other synonyms might include "cloth-bound," "cased-in," or "library-bound," depending on the specific type of bookbinding or cover material used. These terms can be useful when describing the physical qualities of a book, as well as when searching for or categorizing books by specific format or binding style. Overall, there are many different ways to describe a book with a firm, protective cover, and choosing the right synonym can help convey the right meaning and tone for your writing.