108 entries under substantial topic. ×
| important(adjective, significant, large, valuable) | |
| large-scale(adjective, big, large, grand) | |
| sizeable(adjective, significant, large) | |
| generous(adjective, open, great, top) | |
| grand(adjective, strong, great, big, powerful) | |
| liberal(great, spread, big, thick) | |
| unrestricted(adjective, great, complete, total, big) | |
| abundant(adjective, great, big, common) | |
| jumbo(adjective, great, big, generous) | |
| plentiful(adjective, great, perfect, big, common) | |
| princely(adjective, large, generous) | |
| plenteous(great, perfect, adequate, abundant) | |
| rich(adjective, great, heavy, green) | |
| serious(big, significant, large, valuable) | |
| significant(adjective, big, large, valuable) | |
| tidy(adjective, great, informal, big, significant) | |
| weighty(big, significant, large, valuable) | |
| astronomical(common, significant, large, huge) | |
| goodly(great, big, significant, large) | |
| bounteous(great, generous, abundant, sufficient) |
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| APA | Smart Define. (2016). extensive thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/extensive/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "extensive thesaurus" https://smartdefine.org/extensive/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, extensive thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/extensive/thesaurus/synonyms>. |
| MLA | Smart Define. "extensive thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/extensive/thesaurus/synonyms> |