141 entries under big topic. ×
| thorough(adjective, complete, fancy, top, total) | |
| wide-ranging(adjective, complete, total, full) | |
| massive(adjective, great, substantial, large) | |
| long(adjective, time, great, deep) | |
| full(adjective, open, great, complete, top) | |
| copious(adjective, great, top, substantial) | |
| gigantic(adjective, great, large, huge) | |
| all-encompassing(adjective, complete, total, substantial) | |
| colossal(adjective, great, large, huge) | |
| considerable(adjective, great, significant, substantial) | |
| sizable(adjective, open, great, substantial) | |
| wholesale(adjective, common, large, grand) | |
| boundless(adjective, open, great, complete) | |
| complete(adjective, total, common, full) | |
| immeasurable(adjective, great, huge, vast) | |
| prevalent(adjective, common, large, grand) | |
| prodigious(adjective, strong, great, fancy) | |
| substantial(adjective, great, significant, large) | |
| major(adjective, substantial, large, grand) | |
| giant(adjective, great, large, huge) |
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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> |