Cardboards are used extensively in the packaging industry for a variety of purposes. However, there are a few other words that can be used as synonyms for cardboards, depending on the context. Some of the popular synonyms for the term cardboards include corrugated paper, cartons, boxes, packing material, and paperboard. These words are typically used in reference to specific types of cardboard, such as the heavy-duty corrugated paper used to make shipping boxes, or the thin, lightweight paperboard used to create product packaging. Regardless of the synonym used, these materials are essential for safe and secure packaging of products during shipping.