They decided to copper fasten the agreement to ensure its durability.

He copper-fastens the pieces together to ensure they don't come apart.

I found a beautiful chessy copper specimen at the mineral show.

Copper sharks are known for their distinctive copper-colored skin.

The copper group includes copper, silver, and gold.

Black copper is commonly used in electrical wiring.

Cement copper is a type of copper that is obtained by precipitation from copper sulfate solution.

I bought a copper barilla for my kitchen.

Copper Canyon is a breathtaking natural wonder located in Sierra Tarahumara.

The indigo dye is made from the plant Indigofera tinctoria.