| butterflies | |
| buttoned up(expression, clear, careless) | |
| cagey | |
| casual | |
| cautious(careless, reckless) | |
| chalky | |
| chance | |
| changeful | |
| changing | |
| clammed up(expression, clear, careless) | |
| cloud | |
| clouded | |
| cloudy | |
| come apart | |
| consume | |
| contingent on | |
| contradictable | |
| corporeal | |
| counterfeit | |
| critical |
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| APA | Smart Define. (2016). sure thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/sure/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "sure thesaurus" https://smartdefine.org/sure/thesaurus/antonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, sure thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/sure/thesaurus/antonyms>. |
| MLA | Smart Define. "sure thesaurus" 31 March 2016. Web. 24 September 2026. <https://smartdefine.org/sure/thesaurus/antonyms> |