137 entries under significant topic. ×
| crucial(adjective, characteristic, great, severe) | |
| momentous(adjective, substantial, valuable, importance) | |
| essential(adjective, substantial, valuable, main, importance) | |
| critical(adjective, characteristic, great, serious) | |
| vital(adjective, essential, importance, characteristic) | |
| major(adjective, great, exceptional, essential) | |
| consequential(adjective, importance, big, substantial) | |
| noteworthy(adjective, outstanding, worthy, characteristic, great) | |
| notable(adjective, noun, famous, exceptional, outstanding) | |
| influential(adjective, powerful, substantial, notable, importance) | |
| prominent(adjective, famous, outstanding, eminent, characteristic) | |
| serious(adjective, substantial, crucial, great, importance) | |
| weighty(adjective, strong, substantial, importance) | |
| eminent(adjective, great, excellent, famous, prominent) | |
| grave(adjective, substantial, crucial, severe, importance) | |
| famous(adjective, outstanding, great, exceptional) | |
| outstanding(adjective, main, notable, striking, excellent) | |
| distinguished(adjective, outstanding, great, excellent, famous) | |
| leading(adjective, powerful, essential, main) | |
| principal(adjective, essential, basic, vital) |
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| APA | Smart Define. (2016). important thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/important/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "important thesaurus" https://smartdefine.org/important/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, important thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/important/thesaurus/synonyms>. |
| MLA | Smart Define. "important thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/important/thesaurus/synonyms> |