18
eternity(noun, state, time, quality, continue)
11
infinity(noun, limited, age, future, totality)
11
permanence(noun, endurance, stability, continuation, steadiness)
9
endlessness(noun, state, quality, continue, age)
8
constancy(noun, state, endurance, stability, steadiness)
8
endurance(noun, state, stability, steadiness, durability)
8
everlastingness(noun, state, quality, continue, age)
7
interminability(noun, durability, infinity)
7
sempiternity(noun, limited, totality, eternity)
7
timelessness(noun, age, endurance, future, infinity)
6
continuity(noun, state, order, run, arrangement)
6
forever(noun, time, age, future, infinity)
6
continuance(noun, state, run, endurance, stability)
6
durability(noun, endurance, stability, persistence, steadiness)
6
immortality(noun, life, age, endurance, future)
6
lastingness(noun, durability, permanence)
5
age(noun, future, infinity, forever, diuturnity)
5
ceaselessness(noun, state, quality, continue, infinity)
4
boundlessness(noun, infinity)
4
immeasurability(noun, infinity)
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APASmart Define. (2015). perpetuity thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/perpetuity/thesaurus/synonyms
ChicagoSmart Define. 2015. "perpetuity thesaurus" https://smartdefine.org/perpetuity/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, perpetuity thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/perpetuity/thesaurus/synonyms>.
MLASmart Define. "perpetuity thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/perpetuity/thesaurus/synonyms>