Copper is a highly valuable metal that has various applications in manufacturing, construction, and electrical industries. If you're looking for synonyms for the word "more copper," you can use phrases such as "increased copper content," "higher copper concentration," or "greater copper quantity." Other synonyms for the word "more" include "additional," "extra," "supplementary," "further," or "enhanced." You can combine these phrases to convey the idea of adding more copper to a specific product or adding more copper to a production process. These synonyms can help increase the accuracy and clarity of your writing and communication.