| precious metals(expression, idiom, money) | |
| quarter | |
| radium(noun, element, metal) | |
| reddish-brown | |
| rufescent(noun, glowing, cardinal, rose, salmon) | |
| rufous | |
| scratch(noun, money) | |
| silver dollar(expression, idiom, money) | |
| snuff-colored(adjective, dark, drab, bay, buff) | |
| sodium(noun, element, metal) | |
| sorrel(adjective, dark, drab, bay, buff) | |
| strontium(noun, element, metal) | |
| titanium(noun, element, metal) | |
| tungsten(noun, element, metal) | |
| two bits(expression, idiom, money) | |
| uranium(noun, element, metal) | |
| wine(noun, glowing, cardinal, rose, salmon) | |
| zirconium(noun, element, metal) | |
| ruddy(adjective, red) | |
| Old Bill |
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| APA | Smart Define. (2015). copper thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/copper/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "copper thesaurus" https://smartdefine.org/copper/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, copper thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/copper/thesaurus/synonyms>. |
| MLA | Smart Define. "copper thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/copper/thesaurus/synonyms> |