149 entries under important topic. ×
| far-reaching(adjective, big, significant, substantial) | |
| generous(adjective, strong, solid, big) | |
| high-powered | |
| high-profile(adjective, great, extraordinary, unusual) | |
| imperative(adjective, big, significant, substantial) | |
| importunate(hard, tough, big, substantial) | |
| leading(adjective, good, powerful, significant) | |
| life and death(expression, idiom, great, heavy) | |
| manifest(adjective, great, unusual, famous) | |
| memorable(adjective, great, unusual, famous) | |
| mere | |
| mind-blowing(adjective, great, unusual, exceptional) | |
| murder(adjective, rough, difficult, unusual) | |
| nameable(adjective, great, extraordinary, unusual) | |
| noticeable(adjective, great, extraordinary, unusual) | |
| observable(adjective, great, extraordinary, unusual) | |
| paramount(significant, critical, basic, prime) | |
| patent(adjective, unusual, exceptional, remarkable) | |
| playing hard ball(expression, adjective, idiom, great, heavy) | |
| red-letter(adjective, great, extraordinary, unusual) |
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| APA | Smart Define. (2016). serious thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/serious/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "serious thesaurus" https://smartdefine.org/serious/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, serious thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/serious/thesaurus/synonyms>. |
| MLA | Smart Define. "serious thesaurus" 24 February 2016. Web. 24 September 2026. <https://smartdefine.org/serious/thesaurus/synonyms> |