24
temporary
8
short-term
7
ephemeral(adjective, passing, lasting, temporary, momentary)
7
fleeting
6
impermanent(adjective, fleeting)
6
short-lived
5
deciduous
4
interim(adjective, temporary)
4
ever-changing
4
improvised
4
makeshift(noun, adjective, help, temporary)
4
momentary(adjective, brief, fleeting)
4
passing
4
provisional(adjective, tentative, contingent)
4
reversible
4
transient(adjective, temporary)
4
travel
3
brief(adjective, slow)
3
fly-by-night
3
transitory(adjective, temporary, fleeting)
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APASmart Define. (2016). permanent thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/permanent/thesaurus/antonyms
ChicagoSmart Define. 2016. "permanent thesaurus" https://smartdefine.org/permanent/thesaurus/antonyms (accessed September 20, 2026).
HarvardSmart Define 2016, permanent thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/permanent/thesaurus/antonyms>.
MLASmart Define. "permanent thesaurus" 26 February 2016. Web. 20 September 2026. <https://smartdefine.org/permanent/thesaurus/antonyms>