124 entries under significant topic. ×
| tough(adjective, strong, intense, energetic, important) | |
| exigent(adjective, big, heavy, important) | |
| prerequisite(adjective, set, right, important) | |
| underlying(adjective, important, original, essential) | |
| constitutional(adjective, body, material, important) | |
| mandatory(adjective, set, essential, basic) | |
| obligatory(adjective, important, essential, critical) | |
| elementary(adjective, top, important, original) | |
| foremost(adjective, importance, big, important) | |
| heavy(adjective, informal, big, important) | |
| signal(adjective, important, imperative) | |
| acute(adjective, severe, heavy, important) | |
| all-important(adjective, important, serious, essential) | |
| dangerous(great, severe, important, serious) | |
| first(adjective, top, important, original) | |
| primitive(adjective, body, material, important) | |
| quintessential(adjective, important, essential, basic) | |
| rudimentary(adjective, important, original, essential) | |
| something(big, substantial, valuable, imperative) | |
| wanted(adjective, important, serious, essential) |
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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> |