167 entries under important topic. ×
| weighty(great, big, significant, substantial) | |
| august(adjective, fine, significant, grand) | |
| axiological(adjective, significant, original, essential) | |
| axiomatic(significant, original, basic, vital) | |
| bad(adjective, great, tough, top, excellent) | |
| bottom(adjective, significant, original, essential) | |
| bottom-line(adjective, significant, original, essential) | |
| celebrated(adjective, bad, great, excellent, superior) | |
| constitutive(original, serious, capital, basic) | |
| decisive(adjective, great, big, significant) | |
| eventful(adjective, bad, great, excellent, superior) | |
| far-out(adjective, bad, great, excellent, superior) | |
| fine(adjective, top, excellent, superior) | |
| foundational(adjective, significant, original, essential) | |
| grass-roots(adjective, significant, original, essential) | |
| heavyweight(order, great, superior, heavy) | |
| hundred-proof(adjective, bad, great, excellent, superior) | |
| inaugural(adjective, order, heavy, head) | |
| influential(great, significant, usual, serious) | |
| initial(adjective, order, top, heavy) |
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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> |