| clock | |
| clue(noun, information, influence, signal, key) | |
| cock | |
| compendium(noun, information, influence, signal, key) | |
| condition(noun, circumstance) | |
| conjuncture(noun, circumstance) | |
| cornerstone | |
| critical point | |
| crux | |
| cynosure | |
| direction | |
| directory(noun, information, influence, signal, key) | |
| dynamometer | |
| enchiridion(noun, information, influence, signal, key) | |
| episode(noun, circumstance) | |
| episodic(adjective, circumstantial) | |
| essence | |
| essential | |
| essential matter | |
| eventual(adjective, circumstantial) |
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| APA | Smart Define. (2015). landmark thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/landmark/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "landmark thesaurus" https://smartdefine.org/landmark/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, landmark thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/landmark/thesaurus/synonyms>. |
| MLA | Smart Define. "landmark thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/landmark/thesaurus/synonyms> |