164 entries under substantial topic. ×
| astronomical(significant, large, huge, immense) | |
| cumbersome(adjective, heavy, awkward, large) | |
| fleshy(adjective, solid, heavy, awkward) | |
| noteworthy(important, significant, large) | |
| much(significant, large) | |
| respectable(adjective, pleasant, fair, agreeable) | |
| robust(adjective, person, body, strong, sound) | |
| solid(adjective, person, body, strong, sound) | |
| sound(adjective, strong, tough, solid, heavy) | |
| chief(significant, valuable, vital, main) | |
| fab(important, significant, large) | |
| heavy-duty(adjective, strong, great, sound, tough) | |
| plentiful(adjective, great, complete, significant) | |
| primary(important, significant, large, serious) | |
| salient(significant, valuable, vital, imperative) | |
| severe(adjective, heavy) | |
| valuable(adjective, good, strong, great, important) | |
| well-built(adjective, person, body, strong, sound) | |
| appreciable(adjective, significant, large) | |
| athletic(adjective, person, body, strong, sound) |
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| APA | Smart Define. (2016). big thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/big/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "big thesaurus" https://smartdefine.org/big/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, big thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/big/thesaurus/synonyms>. |
| MLA | Smart Define. "big thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/big/thesaurus/synonyms> |