164 entries under significant topic. ×
| prerequisite(adjective, important, capital, essential) | |
| pressing(adjective, big, important, substantial) | |
| primordial(adjective, important, original, essential) | |
| quintessential(adjective, important, essential, basic) | |
| regal(adjective, free, fine, important) | |
| relevant(big, substantial, valuable, vital) | |
| signal(adjective, great, extraordinary, big, unusual) | |
| something(big, substantial, valuable, vital) | |
| standout(adjective, bad, great, excellent, big) | |
| substratal(adjective, important, original, essential) | |
| substrative(adjective, important, original, essential) | |
| supporting(adjective, important, original, essential) | |
| sustaining(adjective, important, original, essential) | |
| theoretical(adjective, important, original, essential) | |
| underived(adjective, important, original, essential) | |
| valuable(big, substantial, large, vital) | |
| wanted(adjective, important, serious, capital) | |
| abundant(large, considerable) | |
| all-important(adjective, essential, basic, vital) | |
| ample(large, considerable) |
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| APA | Smart Define. (2016). principal thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/principal/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "principal thesaurus" https://smartdefine.org/principal/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, principal thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/principal/thesaurus/synonyms>. |
| MLA | Smart Define. "principal thesaurus" 29 March 2016. Web. 27 September 2026. <https://smartdefine.org/principal/thesaurus/synonyms> |