Synonyms|257Antonyms|80|Broader|2Narrower|0Related|279
1
irreducible
1
irresoluble
1
irretrievable
1
irreversible
1
irrevocable
1
lengthy
1
level(adjective, continuous)
1
limitless(constant, abundant, unrestrained, endless, immense)
1
live
1
long
1
long-drawn-out
1
long-range
1
long haul
1
longstanding(permanent, recurrent, perpetual, long-term, lifelong)
1
measureless(adjective, constant, abundant, unrestrained, endless)
1
monolithic(adjective, continuous)
1
multitudinous(constant, abundant, unrestrained, immense, infinite)
1
never-failing
1
no end of(constant, abundant, unrestrained, immense, infinite)
1
no end to(constant, abundant, unrestrained, immense, infinite)
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APASmart Define. (2016). undying thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/undying/thesaurus/synonyms
ChicagoSmart Define. 2016. "undying thesaurus" https://smartdefine.org/undying/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, undying thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/undying/thesaurus/synonyms>.
MLASmart Define. "undying thesaurus" 26 February 2016. Web. 25 September 2026. <https://smartdefine.org/undying/thesaurus/synonyms>