175 entries under unpredictable topic. ×

6
giddy(adjective, weak, careless, silly, uncertain)
6
short-lived(adjective, impulsive, explosive)
6
spasmodic(adjective, anxious, unstable, irregular, unsettled)
6
temperamental(adjective, change, continue, delicate, careless)
6
ticklish(adjective, upset, change, continue, difficult)
6
transitory(adjective, impulsive, explosive)
5
eccentric(adjective, uncertain, irregular, unreliable)
5
mobile(adjective, upset, lively, active, anxious)
5
moody(adjective, careless, unstable, unreasonable)
5
quicksilver(lively, changeable, fickle, untrustworthy)
5
shifty(adjective, weak, false, uncertain)
5
untrustworthy(adjective, false, dishonest, immoral, dubious)
4
elastic(adjective, lively, impulsive, changeable)
4
ephemeral(adjective, impulsive, fickle, explosive)
4
fluid(adjective, upset, change, anxious, unstable)
4
fly-by-night(adjective, loose, unreliable, fickle)
4
fugacious(adjective, impulsive, explosive)
4
fugitive(adjective, impulsive, explosive)
4
gaga(adjective, careless, lively, active, unstable)
4
irresponsible(adjective, unstable, unsettled, unreliable)
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APASmart Define. (2016). inconstant thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/inconstant/thesaurus/synonyms
ChicagoSmart Define. 2016. "inconstant thesaurus" https://smartdefine.org/inconstant/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, inconstant thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/inconstant/thesaurus/synonyms>.
MLASmart Define. "inconstant thesaurus" 4 March 2016. Web. 24 September 2026. <https://smartdefine.org/inconstant/thesaurus/synonyms>