124 entries under significant topic. ×
| theoretical(adjective, important, original, essential) | |
| underived(adjective, important, original, essential) | |
| valuable(big, substantial, precious, imperative) | |
| binding(adjective, essential, basic, required) | |
| bottom line(expression, important, essential, basic) | |
| chips are down(expression, idiom, important, historic) | |
| de rigueur(expression, adjective, essential, basic) | |
| definite(adjective, pleasant, critical, key) | |
| definitive(adjective, last, critical, key) | |
| epochal(important, historic) | |
| eventful(important, historic) | |
| exceptional(big, substantial, valuable, imperative) | |
| expedient(adjective, essential, basic, necessary) | |
| final(adjective, last, critical, key) | |
| grievous(adjective, great, heavy, important) | |
| heavy number(expression, important, historic) | |
| important serious(expression, important, historic) | |
| incumbent on(expression, adjective, essential, basic) | |
| meat and potatoes(expression, idiom, important) | |
| memorable(important, historic) |
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| APA | Smart Define. (2015). vital thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/vital/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "vital thesaurus" https://smartdefine.org/vital/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, vital thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/vital/thesaurus/synonyms>. |
| MLA | Smart Define. "vital thesaurus" 2 November 2015. Web. 28 September 2026. <https://smartdefine.org/vital/thesaurus/synonyms> |