- Definitions|2
- Thesaurus|5k
- Abbreviations|0
140 entries under significant topic. ×
| superabundant(adjective, important, large, ample) | |
| to the max(expression, idiom, big, important) | |
| tolerable | |
| urgent(adjective, big, valuable, vital) | |
| big-deal(adjective, important, large, ample) | |
| chips are down(expression, idiom, important, historic) | |
| commodious(adjective, calm, quiet, light, great) | |
| decisive(big, important, valuable, vital) | |
| distinguished(big, important, large) | |
| doozie(big, important, large) | |
| earth-shattering(important, historic) | |
| epochal(important, historic) | |
| far-reaching(big, important, valuable, vital) | |
| forcible(adjective, strong, sound, tough, solid) | |
| heavy number(expression, important, historic) | |
| important serious(expression, important, historic) | |
| marked(big, definite, large, valuable) | |
| memorable(important, historic) | |
| mondo(big, important, large) | |
| necessary(adjective, great, big, large) |
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| APA | Smart Define. (2016). substantial thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/substantial/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "substantial thesaurus" https://smartdefine.org/substantial/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, substantial thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/substantial/thesaurus/synonyms>. |
| MLA | Smart Define. "substantial thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/substantial/thesaurus/synonyms> |