Yes, copper is a Scrabble word!

Verb

1. Coat with a layer of copper

Noun

1. A ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element; occurs in various minerals but is the only metal that occurs abundantly in large masses; used as an electrical and thermal conductor

2. A copper penny

3. Uncomplimentary terms for a policeman

4. A reddish-brown color resembling the color of polished copper

5. Any of various small butterflies of the family Lycaenidae having coppery wings