| unstable(adjective, clear, weak, sound, soft) | |
| shaky(adjective, strong, weak, sound, soft) | |
| ever changing | |
| mad | |
| wobbly(adjective, weak, sound, soft, steady) | |
| capricious(reasonable, predictable) | |
| explosive | |
| not good | |
| vacillant | |
| precarious(adjective, strong, doubtful, tricky) | |
| ramshackle(adjective, condition, apart) | |
| inconstant(adjective, weak, soft, changeable) | |
| fickle(adjective, cold, hot, steady, vacillating) | |
| unsound(adjective, strong, weak, sound, soft) | |
| changeable(adjective, calm, weak, soft, constant) | |
| changed greatly | |
| crazy | |
| ever-changing | |
| feeble | |
| fluid(adjective, changeable, adaptable) |
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| APA | Smart Define. (2015). stable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/stable/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "stable thesaurus" https://smartdefine.org/stable/thesaurus/antonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, stable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/stable/thesaurus/antonyms>. |
| MLA | Smart Define. "stable thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/stable/thesaurus/antonyms> |