108 entries under substantial topic. ×
| bountiful(adjective, great, heavy, significant) | |
| comfortable(open, significant, large, generous) | |
| decisive(big, significant, valuable, vital) | |
| determining(big, significant, valuable, vital) | |
| earnest(big, significant, valuable, vital) | |
| essential(big, significant, large, valuable) | |
| exigent(big, significant, valuable, vital) | |
| fat(great, big, significant, large) | |
| front-page(big, significant, valuable, vital) | |
| gross(great, big, generous, huge) | |
| heavy(adjective, great, big, important, significant) | |
| imperative(big, significant, valuable, vital) | |
| importunate(big, significant, valuable, vital) | |
| influential(strong, powerful, significant, large) | |
| lavish(great, large, generous, green) | |
| marked(big, significant, large, valuable) | |
| material(big, significant, large, valuable) | |
| mattering much(expression, big, significant, valuable) | |
| meaningful(big, significant, large, valuable) | |
| momentous(big, significant, large, valuable) |
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| APA | Smart Define. (2016). extensive thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/extensive/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "extensive thesaurus" https://smartdefine.org/extensive/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, extensive thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/extensive/thesaurus/synonyms>. |
| MLA | Smart Define. "extensive thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/extensive/thesaurus/synonyms> |