167 entries under important topic. ×
| basic(adjective, body, material, significant) | |
| premier(adjective, order, top, excellent, lead) | |
| central(adjective, lead, head, significant) | |
| prominent(adjective, good, wonderful, famous) | |
| supreme(adjective, order, bad, tough, top) | |
| arch(noun, adjective, order, top, lead) | |
| highest(adjective, order, bad, tough, top) | |
| outstanding(adjective, bad, great, tough, top) | |
| prevailing(adjective, usual, best, key) | |
| sovereign(noun, adjective, excellent, superior) | |
| uppermost(adjective, excellent, lead, rank) | |
| vital(adjective, body, great, importance, material) | |
| elementary(adjective, significant, original, essential) | |
| pivotal(adjective, serious, basic, prime) | |
| significant(adjective, good, great, big) | |
| top(noun, adjective, advance, great, start) | |
| grand(adjective, lead, fine, head) | |
| number one(noun, expression, adjective, order, bad) | |
| preeminent(adjective, order, bad, great, tough) | |
| ruling(adjective, excellent, superior, head) |
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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> |