| loco(mad, insane, psychiatric) | |
| loony(careless, foolish, stupid, unreasonable, unthinking) | |
| lopsided | |
| nervous(adjective, understanding, weak, keen, fine) | |
| nutty(foolish, unreasonable, disturbed, erratic, illogical) | |
| passing | |
| portable(changing, mobile, shifting, movable, transportable) | |
| provisory(adjective, transientness) | |
| psychotic(mad, insane, disturbed, erratic, unhinged) | |
| quicksilver(noun, lively, unpredictable, changeable, indecisive) | |
| rotten | |
| slight | |
| smooth | |
| tense(adjective, upset, understanding, keen, fine) | |
| threatening(adjective, bad, delicate, heavy, uncertain) | |
| top-heavy | |
| transformable(adjective, unsettled, changeable, variable) | |
| tumbledown(adjective, weak, unsettled, danger, unsteady) | |
| unfit | |
| unhealthy(adjective, delicate, uncertain, anxious, ill) |
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| APA | Smart Define. (2016). unstable thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unstable/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "unstable thesaurus" https://smartdefine.org/unstable/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, unstable thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unstable/thesaurus/synonyms>. |
| MLA | Smart Define. "unstable thesaurus" 26 February 2016. Web. 25 September 2026. <https://smartdefine.org/unstable/thesaurus/synonyms> |