The word "cardboard" is correct and usable in written English.
You can use it to describe a material made from flattened paper or similar material, or you can use it to describe a thin but stiff sheet of paper. For example, "This package is made of sturdy cardboard."
While he was well enough the couple went sailing together, and when he was too weak for that he painted obsessively, on cardboard and brown parcel paper, an old bait box, and pieces of china.
"With her cardboard cards and her oatmeal boxes, Inge registered the velocity of propagation of the earthquakes to all parts of the globe.
An improvised cardboard sign, scrawled with "La Rochelle, SVP" worked its magic on a trucker named Olivier and I was soon rolling into this sophisticated old port, perched vertiginously in the cockpit of the 18-wheel juggernaut.
Either way this is not the best preparation for facing Australia on Saturday week and Wales will be looking for a very large cardboard box full of cotton wool for whoever is selected.
Around 60% of the favela's residents earn a living from collecting cardboard on the streets, and much of the construction material comes from their daily rounds, which fan outwards from the neighbourhood of Bom Retiro at one end and Campos Elíseos – São Paulo's run-down 'Champs Élysées', with its itinerant, open-air crack zone known as Cracolândia – at the other.
The open shelves are stacked neatly with "museum quality" (non-acidic and chemical-free) cardboard boxes.
I know that when I look around this room in Mitchell, at the cardboard boxes.
Meanwhile the self-proclaimed rich can skip the queue and proceed up the red carpet to buy cardboard burgers for 600,000 forints (£1,560).
Colourful graphics on the walls illustrate the idea behind the project and residents are asked to fill in surveys at a voting station made from cardboard.
Protesters lined the track and, at Hawick, loaded on a cardboard coffin addressed to the transport minister (which was accepted as a goods parcel) before the train reached Newcastleton, where villagers stood across the line and blocked its passage.
If digitisation holds out the promise of every word ever written being cleanly stored on servers, unwieldy bricks made of paper and cardboard can easily fall into the dreaded modern category of "clutter".
