binder board, binder's board - a cardboard used by bookbinders to make covers for books

card - thin cardboard, usually rectangular

corrugated board, corrugated cardboard - cardboard with corrugations (can be glued to flat cardboard on one or both sides)

paperboard, poster board, posterboard - a cardboard suitable for making posters

pasteboard - stiff cardboard made by pasting together layers of paper

strawboard - a coarse yellow cardboard made of straw pulp

paper - a material made of cellulose pulp derived mainly from wood or rags or certain grasses

packing, packing material, wadding - any material used especially to protect something