66 entries under substantial topic. ×
| sturdy(adjective, significant, large, considerable) | |
| super(adjective, good, bad, great, excellent) | |
| intrinsic(adjective, significant, original, serious) | |
| sober(adjective, energetic, big, heavy) | |
| venerable(adjective, big, significant, large) | |
| ad rem(expression, significant, serious, related) |
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| APA | Smart Define. (2016). important thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/important/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "important thesaurus" https://smartdefine.org/important/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, important thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/important/thesaurus/synonyms>. |
| MLA | Smart Define. "important thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/important/thesaurus/synonyms> |