- Definitions|2
- Thesaurus|5k
- Abbreviations|0
140 entries under significant topic. ×
| major-league(adjective, strong, important, powerful) | |
| much(adjective, large, plenty) | |
| noticeable(adjective, large, considerable, palpable) | |
| reasonable(adjective, sound, fair, rational) | |
| clear-cut(adjective, definite, considerable) | |
| critical(adjective, big, heavy, important) | |
| discernible(adjective, definite, considerable, palpable) | |
| eventful(important, historic) | |
| evident(adjective, physical, material, definite) | |
| good-sized(definite, generous, considerable) | |
| imperative(big, valuable, vital) | |
| main(vital, imperative) | |
| manifest(adjective, definite, considerable, palpable) | |
| noteworthy(adjective, big, important, large) | |
| perceptible(adjective, physical, material, considerable) | |
| pivotal(important, historic) | |
| pointed(adjective, expressive, weighty, telling) | |
| primary(big, important, serious, valuable) | |
| signal(adjective, vital, imperative) | |
| super(great, big, important, large) |
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| APA | Smart Define. (2016). substantial thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/substantial/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "substantial thesaurus" https://smartdefine.org/substantial/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, substantial thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/substantial/thesaurus/synonyms>. |
| MLA | Smart Define. "substantial thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/substantial/thesaurus/synonyms> |