- cardboard, flimsy - resembling cardboard especially in flimsiness; "apartments with cardboard walls"
Antonym: superior (indirect, via inferior)
- cardboard, unlifelike - without substance; "cardboard caricatures of historical figures"
Antonym: natural (indirect, via artificial)
- cardboard, composition board - a stiff moderately thick paper
--1 is a kind of paper; packing material, packing, wadding
--1 has particulars:binder's board, binder board; card; corrugated board, corrugated cardboard; paperboard, poster board, posterboard; pasteboard; strawboard