When it comes to finding synonyms for the term "pillow cover," there are a handful of options to choose from. One option is a pillowcase, which is a common term used to describe the cover that goes over a pillow. Another option could be a cushion cover, which typically refers to a cover for a larger cushion or throw pillow. Alternatively, you could refer to a pillow protector, which is often used to keep a pillow clean and free from allergens or dust mites. Additionally, a shams or pillow shams are often used to describe decorative covers for bed pillows or decorative throw pillows.