167 entries under important topic. ×
| commanding(adjective, free, top, fine, superior) | |
| compelling(adjective, significant, serious, essential) | |
| distinguished(adjective, bad, great, excellent, fine) | |
| famous(adjective, bad, great, excellent, superior) | |
| grave(great, big, head, substantial) | |
| heavy(noun, adjective, order, advance, start) | |
| illustrious(adjective, excellent, famous, significant) | |
| imperative(adjective, big, significant, substantial) | |
| impressive(adjective, bad, great, excellent, fine) | |
| integral(adjective, body, material, significant) | |
| intrinsic(adjective, significant, original, essential) | |
| mainline | |
| needful(adjective, significant, original, capital) | |
| notable(noun, adjective, great, extraordinary, big) | |
| primitive(adjective, body, material, significant) | |
| primo(adjective, order, bad, tough, top) | |
| required(adjective, significant, serious, capital) | |
| serious(great, big, significant, substantial) | |
| superlative(adjective, bad, great, tough, top) | |
| unequaled(adjective, bad, tough, top, perfect) |
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| APA | Smart Define. (2016). principal thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/principal/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "principal thesaurus" https://smartdefine.org/principal/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, principal thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/principal/thesaurus/synonyms>. |
| MLA | Smart Define. "principal thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/principal/thesaurus/synonyms> |