53 entries under unstable topic. ×

54
illogical(adjective, feature, state, condition, situation)
34
weak(adjective, dull, change, mean, bad)
23
decrepit(adjective, strong, light, weak, slight)
19
ailing(adjective, mean, bad, weak, thin)
19
unsound(adjective, strong, light, weak, slight)
18
fragile(adjective, strong, light, weak, slight)
18
shaky(adjective, change, strong, weak, slight)
16
delicate(adjective, mean, bad, strong, weak)
16
rickety(adjective, mean, bad, weak, slight)
12
insubstantial(adjective, strong, light, weak, slight)
12
unsteady(adjective, change, strong, weak, uncertain)
10
unsubstantial(adjective, strong, light, weak, slight)
10
wobbly(adjective, change, mean, bad, strong)
7
wavering(adjective, weak, delicate, uncertain)
6
unsure(adjective, change, strong, weak)
5
precarious(adjective, change, strong, weak)
3
rocky(adjective, mean, bad, weak, thin)
2
dangerous(ill, shaky, insane, unhealthy)
2
unfirm(weak, unsettled, unsteady, trembling)
2
unsettled(weak, unsteady, indecisive, trembling)
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APASmart Define. (2015). infirm thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/infirm/thesaurus/synonyms
ChicagoSmart Define. 2015. "infirm thesaurus" https://smartdefine.org/infirm/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, infirm thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/infirm/thesaurus/synonyms>.
MLASmart Define. "infirm thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/infirm/thesaurus/synonyms>