5
faithless(adjective, dishonest, changeable, untrustworthy, indecisive)
5
feeble(adjective, weak, delicate, ill, sick)
5
fragile(adjective, weak, delicate, false, ill)
5
impulsive(adjective, careless, lively, active, unreasonable)
5
insane(false, foolish, mad, unreasonable, ill)
5
insubstantial(adjective, weak, delicate, false, short)
5
irrational(adjective, foolish, anxious, unreasonable, doubtful)
5
labile
5
mental(adjective, insane, psychiatric)
5
moody(adjective, careless, unreasonable, unpredictable, changeable)
5
not financially secure(adjective, characteristic, quality, finance, banking)
5
not financially strong(adjective, characteristic, quality, finance, banking)
5
not sound financially(adjective, characteristic, quality, finance, banking)
5
of doubtful commericial viability(adjective, characteristic, quality, finance, banking)
5
of doubtful financial viability(adjective, characteristic, quality, finance, banking)
5
suspect(adjective, doubtful, shaky, uneven, unbalanced)
5
touchy(adjective, understanding, keen, fine, sensible)
5
unequal(adjective, stable, irregular)
5
unsteadfast(adjective, changing, mobile, shifting, movable)
5
variant(adjective, change, unsettled, variable)
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APASmart Define. (2016). unstable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/unstable/thesaurus/synonyms
ChicagoSmart Define. 2016. "unstable thesaurus" https://smartdefine.org/unstable/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, unstable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/unstable/thesaurus/synonyms>.
MLASmart Define. "unstable thesaurus" 26 February 2016. Web. 24 September 2026. <https://smartdefine.org/unstable/thesaurus/synonyms>