137 entries under significant topic. ×
| appreciable(adjective, substantial, large) | |
| efficacious(adjective, strong, powerful, useful) | |
| forceful(adjective, energetic, powerful, noble) | |
| heavyweight(adjective, great, big, heavy) | |
| instrumental(adjective, strong, powerful, useful) | |
| talented(adjective, eminent, characteristic, fine, importance) | |
| pregnant(adjective, expressive, meaningful, weighty) | |
| acute(adjective, severe, heavy, serious) | |
| excellent(adjective, bad, great, fine, sensible) | |
| firm(adjective, substantial, large, key) | |
| first(adjective, original, serious, essential) | |
| glorious(adjective, great, famous, brilliant) | |
| sturdy(adjective, substantial, large, considerable) | |
| super(adjective, good, bad, great, excellent) | |
| constitutional(adjective, original, basic, vital) | |
| deep(adjective, tough, severe, intense) | |
| earth-shaking(adjective, serious, critical, historic) | |
| elementary(adjective, original, basic, vital) | |
| exalted(adjective, great, fine, famous) | |
| fine(adjective, grand, comfortable, wealth) |
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| APA | Smart Define. (2016). important thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/important/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "important thesaurus" https://smartdefine.org/important/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, important thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/important/thesaurus/synonyms>. |
| MLA | Smart Define. "important thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/important/thesaurus/synonyms> |