50 entries under fast topic. ×

13
active(adjective, sharp, lively, velocity)
8
lively(adjective, sharp, speedy, brisk)
7
alert(sharp, lively, sprightly, nimble)
7
brisk(sharp, lively, speedy, hasty)
7
quick(adjective, sharp, lively, restless)
6
agile(adjective, quick, velocity, sprightly)
6
fleet(adjective, sharp, lively, quick)
6
rapid(adjective, sharp, lively, quick)
5
hasty(adjective, quick, restless, fiery)
5
spirited(adjective, sharp, lively, changeable)
5
sprightly(adjective, sharp, lively, changeable)
5
winged(sharp, lively, velocity, speedy)
4
express(quick, velocity, brisk, hasty)
4
flying(quick, velocity, speedy, brisk)
4
nimble(quick, velocity, sprightly, supple)
4
spry(adjective, sharp, lively, quick)
3
expeditious(quick, velocity, rapid, speedy)
3
speedy(quick, velocity, brisk, hasty)
3
swift(sharp, lively, velocity, speedy)
2
animated(rapid, swift)
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APASmart Define. (2015). mercurial thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/mercurial/thesaurus/synonyms
ChicagoSmart Define. 2015. "mercurial thesaurus" https://smartdefine.org/mercurial/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, mercurial thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/mercurial/thesaurus/synonyms>.
MLASmart Define. "mercurial thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/mercurial/thesaurus/synonyms>