Cardboard is a generic non-specific term for a heavy duty paper based product.
Paperboard
Paperboard is a paper based material. It is often used for folding cartons, set-up boxes, carded packaging, etc.
Corrugated fiberboard
Corrugated fiberboard is a combination of paperboards, usually two flat pieces of paper and one inner intestined corrugated medium. It is often used for making boxes for shipping products.
Cards
Various types of cards are available. Some are made from heavy paper stock, which may be called "cardboard."
