2
lengthened(adjective, great, deep, high, remote)
2
level(adjective, continuous)
2
lifetime(adjective, durable)
2
livelong(adjective, durable, diuturnity)
2
living(verb, adjective, existing)
2
long-life(adjective, durable)
2
longeval
2
longstanding(adjective, vast, permanent, recurrent, perpetual)
2
macrobiotic
2
marathon
2
memorable(adjective, significant, noteworthy)
2
monotonous(adjective, persistent, continuous, endless, relentless)
2
never-ending(adjective, constant, continuous, everlasting, eternal)
2
obstinate(persistent, remaining)
2
of long duration(expression, idiom, diuturnity)
2
ongoing(adjective, current, permanent, long-term, lifelong)
2
outlasting(verb, enduring)
2
outliving(verb, enduring)
2
perduring(tough, stable, sturdy, constant, vast)
2
perpetuating(verb, enduring, perpetuating)
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APASmart Define. (2016). lasting thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/lasting/thesaurus/synonyms
ChicagoSmart Define. 2016. "lasting thesaurus" https://smartdefine.org/lasting/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, lasting thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/lasting/thesaurus/synonyms>.
MLASmart Define. "lasting thesaurus" 26 February 2016. Web. 22 September 2026. <https://smartdefine.org/lasting/thesaurus/synonyms>