16 entries under tough topic. ×

12
durable(adjective, calm, strong, continue)
12
lasting(adjective, calm, strong, continue)
9
indestructible(adjective, strong, stable, constant)
9
stable(adjective, fixed, sturdy, constant)
4
long-lasting(adjective, continue, sturdy, enduring)
2
perduring(stable, sturdy, constant, enduring)
2
unbreakable(adjective, strong)
1
fast(calm, strong, solid, substantial)
1
firm(calm, strong, steady, even)
1
fixed(stable, sturdy, constant, enduring)
1
reliable(calm, strong, solid, substantial)
1
sound(calm, strong, solid, substantial)
1
stout(calm, strong, solid, substantial)
1
strong(calm, solid, steady, substantial)
1
sturdy(calm, strong, solid, steady)
1
substantial(calm, strong, solid, steady)
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APASmart Define. (2016). perdurable thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/perdurable/thesaurus/synonyms
ChicagoSmart Define. 2016. "perdurable thesaurus" https://smartdefine.org/perdurable/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, perdurable thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/perdurable/thesaurus/synonyms>.
MLASmart Define. "perdurable thesaurus" 3 March 2016. Web. 25 September 2026. <https://smartdefine.org/perdurable/thesaurus/synonyms>