19 entries under clear topic. ×
| stable(adjective, weak, sound, soft) | |
| steady(adjective, sound, stable, fixed) | |
| strong(adjective, sound, steady) | |
| firm(noun, adjective, sound, steady) | |
| certain(adjective, sound, steady) | |
| constant(adjective, sound, sympathetic, steady) | |
| easy(adjective, sound, steady) | |
| reliable(adjective, bad, weak, sound) | |
| secure(verb, adjective, weak, sound) | |
| sound(adjective, steady) | |
| sure(adjective, sound, steady) | |
| unchanging(adjective, sound, steady) | |
| definite(adjective, sound, steady) | |
| dependable(adjective, weak, sound, steady) | |
| predictable(adjective, sound, steady) | |
| guarded(adjective, sound, steady) | |
| protected(adjective, sound, steady) | |
| safe(adjective, sound, steady) | |
| unshaky(adjective, sound, steady) |
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Unstable on
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| APA | Smart Define. (2016). unstable thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unstable/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "unstable thesaurus" https://smartdefine.org/unstable/thesaurus/antonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, unstable thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unstable/thesaurus/antonyms>. |
| MLA | Smart Define. "unstable thesaurus" 26 February 2016. Web. 26 September 2026. <https://smartdefine.org/unstable/thesaurus/antonyms> |