20
infinity(noun, limited, deity, totality, infinity)
18
perpetuity(noun, state, time, quality, continue)
13
aeon(noun, infinity, perpetuity, forever)
12
forever(noun, infinity, perpetuity, everlastingness, endless time)
10
everlastingness(noun, state, quality, continue, heaven)
10
timelessness(noun, infinity, forever)
9
immortality(noun, continue, heaven, happiness, life)
8
endlessness(noun, state, quality, continue, infinity)
8
age(noun, time, informal, forever, diuturnity)
7
afterlife(noun, continue, live, death, forever)
5
permanence(noun, perpetuity)
5
heaven(noun, place, heaven, wonderful, ecstasy)
4
future(noun, time, forever)
4
eternalness(noun, state, quality, continue, limited)
4
glory(noun, transport, heaven, happiness, ecstasy)
4
immeasurability(noun, infinity)
4
inexhaustibility(noun, infinity)
4
infinitude(noun, forever)
4
kingdom come(noun, expression, happiness, glory, ecstasy)
4
majesty(noun, deity)
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APASmart Define. (2015). eternity thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/eternity/thesaurus/synonyms
ChicagoSmart Define. 2015. "eternity thesaurus" https://smartdefine.org/eternity/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, eternity thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/eternity/thesaurus/synonyms>.
MLASmart Define. "eternity thesaurus" 11 November 2015. Web. 20 September 2026. <https://smartdefine.org/eternity/thesaurus/synonyms>