76 entries under basic topic. ×
| important(adjective, good, strong, great, tough) | |
| momentous(adjective, good, clear, strong, great) | |
| crucial(adjective, great, tough, severe, extraordinary) | |
| vital(adjective, great, importance, big, heavy) | |
| outstanding(adjective, clear, great, extraordinary, importance) | |
| major(adjective, great, tough, severe, superior) | |
| chief(adjective, superior, big, unusual, important) | |
| essential(adjective, importance, big, important, original) | |
| decisive(adjective, great, extraordinary, big, important) | |
| key(adjective, importance, important, guide, original) | |
| principal(adjective, good, great, big, important) | |
| central(adjective, important, original, essential) | |
| compelling(adjective, clear, important, meaning, essential) | |
| leading(adjective, good, important, powerful, rank) | |
| pressing(verb, adjective, tough, severe, big) | |
| cardinal(adjective, important, original, essential, critical) | |
| fundamental(adjective, important, original, essential, critical) | |
| necessary(adjective, big, important, original, substantial) | |
| primary(adjective, superior, big, unusual, important) | |
| urgent(adjective, clear, tough, severe, big) |
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| APA | Smart Define. (2016). significant thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/significant/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "significant thesaurus" https://smartdefine.org/significant/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, significant thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/significant/thesaurus/synonyms>. |
| MLA | Smart Define. "significant thesaurus" 4 March 2016. Web. 21 September 2026. <https://smartdefine.org/significant/thesaurus/synonyms> |