| Colorado | |
| carbon monoxide(noun, gas) | |
| cobalt | |
| Centennial State | |
| conscientious objector | |
| atomic number 27 | |
| carbon monoxide gas | |
| academic | |
| collaboration | |
| commanding officer(noun, expression, superior, leader, chief) | |
| cooperation | |
| cooperative | |
| head honcho(expression, superior, head, chief, captain) | |
| officer(superior, head, boss, leader, chief) | |
| top brass(expression, superior, head, chief, major) | |
| top dog(expression, superior, head, chief, captain) | |
| chief(company, superior, head, boss, leader) | |
| commandant(noun, superior, head, leader, chief) | |
| commander(noun, superior, boss, leader, chief) | |
| head person(expression, superior, head, chief, captain) |
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| APA | Smart Define. (2014). co thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/co/thesaurus/synonyms |
| Chicago | Smart Define. 2014. "co thesaurus" https://smartdefine.org/co/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2014, co thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/co/thesaurus/synonyms>. |
| MLA | Smart Define. "co thesaurus" 28 January 2014. Web. 20 September 2026. <https://smartdefine.org/co/thesaurus/synonyms> |