4
imperishable(adjective, stable, constant, enduring, lasting)
4
leathery
4
massive(significant, large, considerable)
4
old(adjective, continue, permanent, aged, recurrent)
4
set(verb, adjective, calm, strong, secure)
4
time-consuming
4
undestroyable
4
undying(adjective, enduring, lasting, permanent, recurrent)
3
ancient(adjective, aged)
3
continuous(adjective, stable)
3
evergreen
3
heavy-duty(adjective, strong, sound, tough, solid)
3
immovable(adjective, strong, secure, firm, solid)
3
impervious(verb, adjective, sturdy, enduring)
3
incessant(adjective, permanent, recurrent, perpetual, long-term)
3
livelong(adjective, diuturnity)
3
long
3
of long duration(expression, idiom, diuturnity)
3
perduring(adjective, tough, stable, sturdy, constant)
3
persisting(adjective, permanent, long-term, lifelong)
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APASmart Define. (2015). durable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/durable/thesaurus/synonyms
ChicagoSmart Define. 2015. "durable thesaurus" https://smartdefine.org/durable/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, durable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/durable/thesaurus/synonyms>.
MLASmart Define. "durable thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/durable/thesaurus/synonyms>