There are several synonyms for the term "book jackets" which refers to the protective coverings that protect a book's binding and pages. One such synonym is "dust jacket," which is a removable paper cover that protects the hardcover of a book. Another common synonym is "book cover," which can refer to any type of protective covering used for books, including hardcovers, paperbacks, and leather-bound editions. Other synonyms might include "book sleeves," "book wrappers" or "book sheaths." No matter which synonym you choose to use, the purpose remains the same: to protect the contents of a book while also providing a visually appealing and informative cover.