164 entries under substantial topic. ×
| well-founded(adjective, strong, sound, tough, solid) | |
| well-made(adjective, strong, sound, tough, solid) | |
| able-bodied(adjective, person, body, strong, sound) | |
| something(important, significant, large, valuable) | |
| stable(adjective, strong, sound, tough, solid) | |
| stark(adjective, strong, sound, tough, solid) | |
| staunch(adjective, strong, sound, tough, solid) | |
| steady(adjective, strong, sound, tough, solid) | |
| super-duper(adjective, important, significant, large) | |
| tenacious(adjective, strong, sound, tough, solid) | |
| unyielding(adjective, strong, sound, tough, solid) | |
| big deal(expression, heavy) | |
| estimable(adjective, generous, highpowered, sizable) | |
| exceptional(significant, valuable, vital, imperative) | |
| filling | |
| life and death(expression, idiom, heavy) | |
| no-nonsense | |
| potent(adjective, strong, sound, tough, heavy) | |
| rich(great, generous, liberal, sufficient) | |
| sedate |
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| APA | Smart Define. (2016). big thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/big/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "big thesaurus" https://smartdefine.org/big/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, big thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/big/thesaurus/synonyms>. |
| MLA | Smart Define. "big thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/big/thesaurus/synonyms> |