116 entries under substantial topic. ×
| strong(adjective, calm, clear, strong, hard) | |
| stable(adjective, strong, hard, complete, secure) | |
| firm(noun, adjective, calm, strong, hard) | |
| unfluctuating(adjective, calm, strong, secure, strain) | |
| robust(adjective, health, strong, complete, secure) | |
| stout(adjective, calm, strong, tough, right) | |
| fast(adjective, calm, strong, secure, tough) | |
| durable(adjective, calm, strong, secure, tough) | |
| steady(adjective, calm, quiet, strong, secure) | |
| tight(adjective, good, strong, hard, secure) | |
| steadfast(adjective, calm, strong, secure, easy) | |
| enduring(adjective, calm, strong, secure, tough) | |
| constant(adjective, calm, strong, secure, tough) | |
| unyielding(adjective, strong, hard, tough, strain) | |
| settled(adjective, strong, secure, easy, strain) | |
| stabile(adjective, calm, strong, secure, strain) | |
| solid(verb, adjective, calm, good, clear) | |
| healthy(adjective, health, good, clear, strong) | |
| hale(adjective, health, good, strong, complete) | |
| safe(adjective, calm, good, clear, strong) |
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| APA | Smart Define. (2016). sound thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/sound/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "sound thesaurus" https://smartdefine.org/sound/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, sound thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/sound/thesaurus/synonyms>. |
| MLA | Smart Define. "sound thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/sound/thesaurus/synonyms> |