Hardcover books are a staple of the publishing world, but there are synonyms that can be used to describe this type of binding. One option is "casebound," which refers to a book that has a cover made of cardboard or another rigid material that is then bound with fabric or leather. "Clothbound" is another term that is used to describe hardcover books with a fabric cover. Meanwhile, "library binding" typically refers to hardcover books that are designed to withstand a lot of use, with reinforced bindings and sturdy covers. Finally, "hardback" can be used as a straightforward synonym for a book with a hardcover.