A slipcase, also known as a dust jacket or a book cover, is an essential element in preserving the integrity and value of books or other valuable items. For those looking for synonyms for the word slipcase, there are several alternatives, including casewrap, book jacket, book sleeve, book covering, and protective cover, among others. These synonyms offer flexibility in describing the protection provided to books, documents, and other items. Depending on the context, one of these synonym options may be more suitable and precise than others, but each can provide a useful description of the protective covering for valuable items.