8 entries under sound topic. ×
| unstable(adjective, clear, weak, soft) | |
| shaky(adjective, strong, weak, soft) | |
| wobbly(adjective, weak, soft, steady) | |
| unsound(adjective, strong, weak, soft) | |
| irrational(adjective, rational, senseless, illogical) | |
| decrepit | |
| anile | |
| run-down |
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| APA | Smart Define. (2015). stable thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/stable/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "stable thesaurus" https://smartdefine.org/stable/thesaurus/antonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, stable thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/stable/thesaurus/antonyms>. |
| MLA | Smart Define. "stable thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/stable/thesaurus/antonyms> |