1
cuprous
1
eagle
1
ebullient
1
ebullition
1
effervescence
1
elastic(lively, unpredictable, changeable, temperamental)
1
energetic
1
expansive(lively, unpredictable, changeable, temperamental)
1
faddish
1
faithless(changeable, fickle, untrue, untrustworthy, unprincipled)
1
falsehearted(fickle, untrustworthy, unprincipled, dirty-dealing)
1
ferment
1
fermentation
1
ferrous
1
ferruginous
1
fitful(adjective, changeable, indecisive, inconsistent)
1
flaky(lively, unpredictable, changeable, temperamental)
1
flash
1
flip(lively, unpredictable, changeable)
1
flirtatious
10 years ago|3.3k views|share |citing 
APASmart Define. (2016). quicksilver thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/quicksilver/thesaurus/synonyms
ChicagoSmart Define. 2016. "quicksilver thesaurus" https://smartdefine.org/quicksilver/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, quicksilver thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/quicksilver/thesaurus/synonyms>.
MLASmart Define. "quicksilver thesaurus" 1 April 2016. Web. 23 September 2026. <https://smartdefine.org/quicksilver/thesaurus/synonyms>