7
cursory(adjective, brief, transient, transitory, short-lived)
7
fickle(adjective, impulsive, unpredictable, transient, explosive)
7
meteoric(adjective, brief, immediate, instant, sudden)
7
perishable(adjective, present, short, limited, brief)
7
short-term(adjective, temporary, transient)
6
episodic(adjective, passing, transient, momentary, short-lived)
6
mutable(adjective, transient)
6
provisional(adjective, tentative, contingent)
5
deciduous
5
insubstantial(adjective, light, weak, slight, short)
5
pro tem(adjective, temporary)
5
shifting(adjective, transient, transientness)
4
flickering(adjective, transient)
4
inconstant(adjective, impulsive, unpredictable, fickle, explosive)
4
interim
4
little(adjective, transitory, short-lived)
4
makeshift
4
quick(adjective, transient, transitory, short-lived)
4
restless(adjective, transient)
4
rootless(adjective, transient)
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APASmart Define. (2016). ephemeral thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/ephemeral/thesaurus/synonyms
ChicagoSmart Define. 2016. "ephemeral thesaurus" https://smartdefine.org/ephemeral/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, ephemeral thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/ephemeral/thesaurus/synonyms>.
MLASmart Define. "ephemeral thesaurus" 26 February 2016. Web. 23 September 2026. <https://smartdefine.org/ephemeral/thesaurus/synonyms>