167 entries under important topic. ×
| stellar(adjective, great, tough, top, heavy) | |
| ace(noun, adjective, bad, great, tough) | |
| greatest(adjective, bad, tough, top, excellent) | |
| momentous(adjective, good, bad, great, excellent) | |
| necessary(adjective, body, material, big) | |
| radical(adjective, great, importance, significant) | |
| champion(adjective, order, bad, character, tough) | |
| controlling(adjective, top, superior, head) | |
| crucial(adjective, great, big, significant) | |
| great(adjective, bad, excellent, superior, big) | |
| substantial(adjective, big, significant, large) | |
| best(adjective, top, excellent, lead) | |
| big(adjective, significant, substantial, large) | |
| elemental(adjective, body, material, significant) | |
| eminent(adjective, good, bad, great, excellent) | |
| incomparable(adjective, bad, tough, top, perfect) | |
| peerless(adjective, bad, tough, top, perfect) | |
| underlying(adjective, significant, original, essential) | |
| basal(adjective, body, lead, material) | |
| critical(adjective, great, big, substantial) |
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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> |