7 entries under undying topic. ×

23
immortal(adjective, constant, continuous, endless, indefinite)
17
ageless(adjective, change, endless, enduring, lasting)
7
perennial(adjective, constant, endless, indefinite, lasting)
3
immutable(adjective, lasting, permanent, everlasting, unending)
3
evergreen(adjective, endless, everlasting, eternal, perpetual)
3
indefinite(adjective, lasting, permanent, everlasting, eternal)
2
perdurable(lasting, permanent, everlasting, eternal, unending)
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APASmart Define. (2016). timeless thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/timeless/thesaurus/synonyms
ChicagoSmart Define. 2016. "timeless thesaurus" https://smartdefine.org/timeless/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, timeless thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/timeless/thesaurus/synonyms>.
MLASmart Define. "timeless thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/timeless/thesaurus/synonyms>