34
unreliable(adjective, strong, false, passionate, careless)
25
fickle(adjective, passionate, careless, excited, foolish)
24
untrustworthy(adjective, false, careless, foolish, uncertain)
21
uncertain(adjective, passionate, nervous, unstable, irregular)
19
inconstant(adjective, unstable, irregular, unsettled, unpredictable)
19
unstable(adjective, delicate, passionate, careless, foolish)
16
capricious(adjective, false, passionate, careless, excited)
16
erratic(adjective, passionate, uncertain, unstable, irregular)
16
unsteady(adjective, uncertain, unstable, feeble, unsettled)
15
changeable(adjective, passionate, excited, unstable, irregular)
14
dubious(adjective, uncertain, nervous, dishonest, doubtful)
13
treacherous(adjective, false, dishonest, deceitful, unpredictable)
13
unpredictable(adjective, passionate, careless, foolish, unstable)
12
irresponsible(adjective, careless, excited, foolish, unstable)
12
unsure(adjective, uncertain, nervous, unstable, dishonest)
12
wavering(adjective, uncertain, nervous, unstable, irregular)
11
fly-by-night(adjective, false, careless, foolish, uncertain)
11
variable(adjective, passionate, unstable, irregular, unsettled)
10
inconsistent(adjective, passionate, unstable, irregular, unsettled)
10
volatile(adjective, passionate, unstable, irregular, unsettled)
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APASmart Define. (2016). undependable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/undependable/thesaurus/synonyms
ChicagoSmart Define. 2016. "undependable thesaurus" https://smartdefine.org/undependable/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, undependable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/undependable/thesaurus/synonyms>.
MLASmart Define. "undependable thesaurus" 4 March 2016. Web. 22 September 2026. <https://smartdefine.org/undependable/thesaurus/synonyms>