When it comes to protective covers, there are quite a few synonyms to choose from. Some common alternatives to this term include shielding, safeguarding, insulation, casing, casing, wrapping, wrapper, envelope, jacket, sheath, enclosure, housing, shell, and pouch. Depending on the context in which you are using this term, one of these options may be more appropriate than the others. For example, if you are talking about protecting a phone or other electronic device, you might use the term "case" instead of "cover." Ultimately, the right synonym for "protective cover" will depend on your specific needs and the context in which you are using the term.