9 entries under extension topic. ×

16
endurance(noun, strength, life, resolution)
14
permanence(noun, run, strength, resolution)
6
continuance(noun, strength, resolution, fortitude)
5
persistence(noun, strength, resolution, fortitude)
5
survival(noun, run, strength, resolution)
4
duration(noun, run, strength, course, resolution)
2
period(noun, run, course, age)
2
vitality(noun, run, strength, resolution)
1
continuation(noun, strength, resolution, fortitude)
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APASmart Define. (2015). longevity thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/longevity/thesaurus/synonyms
ChicagoSmart Define. 2015. "longevity thesaurus" https://smartdefine.org/longevity/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, longevity thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/longevity/thesaurus/synonyms>.
MLASmart Define. "longevity thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/longevity/thesaurus/synonyms>