65 entries under secure topic. ×

71
strong(verb, adjective, calm, sound)
64
stable(adjective, strong, sound, tough)
61
firm(noun, adjective, calm, strong, sound)
49
sound(adjective, calm, strong, tough)
37
substantial(adjective, calm, strong, sound)
37
unfluctuating(adjective, calm, strong, strain)
36
enduring(adjective, calm, strong, sound)
35
stout(adjective, calm, strong, sound)
33
constant(adjective, calm, strong, tough)
29
fast(adjective, calm, strong, tough)
29
steady(adjective, calm, strong, sound)
28
sturdy(adjective, calm, strong, sound)
25
steadfast(adjective, calm, strong, strain)
23
robust(adjective, strong, sound, tough)
22
tough(verb, adjective, calm, strong, sound)
20
settled(adjective, strong, strain, firm)
19
stabile(adjective, calm, strong, strain)
10
abiding(adjective, calm, strong, tough)
9
fixed(adjective, strong, sound, tough)
8
well-built(adjective, calm, strong, sound)
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APASmart Define. (2015). durable thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/durable/thesaurus/synonyms
ChicagoSmart Define. 2015. "durable thesaurus" https://smartdefine.org/durable/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, durable thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/durable/thesaurus/synonyms>.
MLASmart Define. "durable thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/durable/thesaurus/synonyms>