103 entries under significant topic. ×
| crucial(adjective, important, original, capital) | |
| overriding(adjective, important, serious, prime) | |
| critical(adjective, original, essential, vital) | |
| necessary(adjective, important, original, capital) | |
| master(adjective, top, lead, superior, important) | |
| pivotal(adjective, important, serious, basic) | |
| big(adjective, important, vital, principal) | |
| focal(adjective, important, key, chief) | |
| great(adjective, bad, excellent, important, wonderful) | |
| prominent(adjective, good, important, wonderful, famous) | |
| superior(adjective, quality, bad, great, top) | |
| momentous(adjective, good, bad, great, excellent) | |
| ruling(adjective, important, head, usual) | |
| grave(head, vital, imperative) | |
| serious(basic, prime, vital, imperative) | |
| notable(adjective, great, big, important, wonderful) | |
| noteworthy(adjective, important, wonderful, exceptional, marvelous) | |
| radical(importance, important, original, essential) | |
| substantial(adjective, vital, imperative) | |
| considerable(vital, imperative) |
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| APA | Smart Define. (2016). main thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/main/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "main thesaurus" https://smartdefine.org/main/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, main thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/main/thesaurus/synonyms>. |
| MLA | Smart Define. "main thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/main/thesaurus/synonyms> |