Card sleeve is a term used to refer to a protective covering for a card, which can come in different sizes, materials, and designs. There are various synonyms for the word card sleeve that can be used interchangeably, depending on the context. Some of these synonyms include plastic protector, card holder, card case, card cover, and card jacket. These synonyms also come in different variations, such as clear plastic sleeves, leather card cases, and vinyl card holders. They serve the same purpose of protecting cards from wear and tear, moisture, dirt, and other external factors that can damage the card's quality and appearance. Choosing the right synonym for card sleeve depends on the particular use and preference of the user.