149 entries under important topic. ×
| preeminent(great, outstanding, prominent, prime) | |
| radical | |
| ruling(adjective, prominent, basic, prime) | |
| sacrosanct | |
| stand out(expression, unusual, exceptional, evident) | |
| star | |
| stellar | |
| superior(adjective, significant, critical, prominent) | |
| top |
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| APA | Smart Define. (2016). serious thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/serious/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "serious thesaurus" https://smartdefine.org/serious/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, serious thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/serious/thesaurus/synonyms>. |
| MLA | Smart Define. "serious thesaurus" 24 February 2016. Web. 25 September 2026. <https://smartdefine.org/serious/thesaurus/synonyms> |