14
temporary
11
brief
10
changed greatly
8
intermittent(adjective, irregular, sporadic)
5
fleeting(adjective, limited, irregular, permanent, temporary)
4
evanescent
4
impermanent
4
erratic
4
occasional
3
transient
3
passing
2
discontinuous
2
short-lived
2
transitory(adjective, fleeting)
2
human(time, life, period, eternity)
2
interim
2
periodic
2
provisional
1
momentary
1
acting
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APASmart Define. (2016). perpetual thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/perpetual/thesaurus/antonyms
ChicagoSmart Define. 2016. "perpetual thesaurus" https://smartdefine.org/perpetual/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2016, perpetual thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/perpetual/thesaurus/antonyms>.
MLASmart Define. "perpetual thesaurus" 30 March 2016. Web. 25 September 2026. <https://smartdefine.org/perpetual/thesaurus/antonyms>