55 entries under tough topic. ×

71
strong(verb, adjective, calm, sound, secure)
64
stable(adjective, strong, sound, secure)
61
firm(noun, adjective, calm, strong, sound)
49
sound(adjective, calm, strong, secure)
37
substantial(adjective, calm, strong, sound, secure)
36
enduring(adjective, calm, strong, sound, secure)
35
stout(adjective, calm, strong, sound, secure)
33
constant(adjective, calm, strong, secure)
29
fast(adjective, calm, strong, secure)
29
steady(adjective, calm, strong, sound, secure)
28
sturdy(adjective, calm, strong, sound, secure)
23
robust(adjective, strong, sound, secure)
22
unyielding(adjective, strong, sound, strain)
15
indestructible(adjective, strong, stable, sturdy)
15
long-lasting(adjective, continue, stable, enduring)
14
solid(adjective, calm, strong, sound)
13
perdurable(adjective, calm, strong, continue)
10
abiding(adjective, calm, strong, secure)
9
fixed(adjective, strong, sound, secure)
8
well-built(adjective, calm, strong, sound, secure)
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APASmart Define. (2015). durable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/durable/thesaurus/synonyms
ChicagoSmart Define. 2015. "durable thesaurus" https://smartdefine.org/durable/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, durable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/durable/thesaurus/synonyms>.
MLASmart Define. "durable thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/durable/thesaurus/synonyms>