10
uncertain(adjective, change, continue, delicate, passionate)
10
undependable(adjective, passionate, unstable, irregular, unsettled)
10
unreliable(adjective, passionate, unstable, irregular, unsettled)
10
unsettled(adjective, weak, unstable, irregular, impulsive)
10
wavering(adjective, unstable, irregular, unsettled, unpredictable)
8
ever changing
8
fluctuating(adjective, lively, active, unstable, irregular)
8
fluid(adjective, unstable, unsettled, unpredictable, unreliable)
8
irresolute(adjective, unstable, irregular, unsettled, unpredictable)
8
lively(adjective, sharp, fast, speedy, brisk)
8
movable(adjective, lively, unstable, unsettled, changeable)
8
temperamental(adjective, change, continue, delicate, cross)
8
vacillating(adjective, unstable, irregular, unsettled, unpredictable)
7
alert(sharp, lively, fast, sprightly, nimble)
7
brisk(sharp, lively, fast, speedy, hasty)
7
easygoing(adjective, attitude, behavior, sexual moral, sexual activity)
7
impulsive(adjective, cross, careless, lively, melancholy)
7
irregular(adjective, lively, uncertain, active, unstable)
7
quick(adjective, sharp, lively, fast, restless)
6
agile(adjective, fast, quick, velocity, sprightly)
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APASmart Define. (2015). mercurial thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/mercurial/thesaurus/synonyms
ChicagoSmart Define. 2015. "mercurial thesaurus" https://smartdefine.org/mercurial/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, mercurial thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/mercurial/thesaurus/synonyms>.
MLASmart Define. "mercurial thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/mercurial/thesaurus/synonyms>