195 entries under adjective topic. ×
| essential(importance, valuable, basic, fundamental) | |
| central(lead, important, head, master) | |
| vital(importance, important, valuable, essential) | |
| principal(lead, important, head, significant) | |
| important(importance, valuable, main, notable) | |
| fundamental(noun, important, head, significant) | |
| main(lead, important, head, significant) | |
| cardinal(noun, lead, important, head) | |
| chief(lead, important, head, significant) | |
| primary(lead, important, head, significant) | |
| crucial(important, significant, original, essential) | |
| substantial(importance, important, valuable, main) | |
| core(noun, lead, importance, head) | |
| grand(lead, importance, head, master) | |
| major(lead, important, head, significant) | |
| material(importance, important, significant, large) | |
| prime(lead, important, head, significant) | |
| serious(importance, important, valuable, main) | |
| weighty(importance, important, valuable, main) | |
| basic(important, head, significant, beginning) |
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| APA | Smart Define. (2016). key thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/key/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "key thesaurus" https://smartdefine.org/key/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, key thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/key/thesaurus/synonyms>. |
| MLA | Smart Define. "key thesaurus" 29 March 2016. Web. 20 September 2026. <https://smartdefine.org/key/thesaurus/synonyms> |