14
permanent(adjective, constant, lasting, temporary)
10
eternal(adjective, pause, limited, endless, lasting)
9
endless
9
lasting(adjective, temporary)
6
long(adjective, weak, low, excessive, lasting)
6
ceaseless
6
everlasting(adjective, lasting)
6
constant(adjective, sympathetic, broken, finished, occasional)
5
perpetual(adjective, limited, irregular, lasting, continual)
4
enduring(adjective, lasting)
3
timeless
2
long-lived(adjective, lasting)
2
undying
2
unending(irregular, broken, finite)
2
chronic
1
deathless
1
immortal(adjective, imperishable)
1
interminable(adjective, limited, lasting, finite)
1
changeless
1
continuing
10 years ago|3.7k views|share |citing 
APASmart Define. (2016). ephemeral thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/ephemeral/thesaurus/antonyms
ChicagoSmart Define. 2016. "ephemeral thesaurus" https://smartdefine.org/ephemeral/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2016, ephemeral thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/ephemeral/thesaurus/antonyms>.
MLASmart Define. "ephemeral thesaurus" 26 February 2016. Web. 22 September 2026. <https://smartdefine.org/ephemeral/thesaurus/antonyms>