| staple(adjective, lead, head, master, basic) | |
| strategic(adjective, crucial) | |
| atoll(noun, island) | |
| archipelago(noun, island) | |
| attune | |
| base(noun, adjective, part, lead, head) | |
| cay | |
| clarification(noun, report, account, answer, meaning) | |
| crux(noun, adjective, cause, lead, head) | |
| discover | |
| distinguish | |
| holm(noun, island) | |
| index(noun, answer, solution) | |
| lock opener | |
| minor | |
| pivot(noun, cause, answer, solution) | |
| pointer(noun, information, sign, influence, guide) | |
| premier(adjective, lead, important, head, beginning) | |
| secret(noun, confidence, means, interpretation, mystery) | |
| sign(noun, information, return, influence, report) |
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| APA | Smart Define. (2016). key thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/key/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "key thesaurus" https://smartdefine.org/key/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, key thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/key/thesaurus/synonyms>. |
| MLA | Smart Define. "key thesaurus" 29 March 2016. Web. 21 September 2026. <https://smartdefine.org/key/thesaurus/synonyms> |