55 entries under tough topic. ×

8
dependable(adjective, strong, firm, solid)
8
hardy(adjective, strong, hard, sound)
7
vigorous(adjective, strong, sound, solid)
6
hale(adjective, strong, sound, solid)
6
reliable(adjective, calm, strong, secure)
6
stalwart(adjective, calm, strong, sound, secure)
6
tenacious(adjective, strong, sound, secure)
5
hearty(adjective, strong, sound, solid)
5
unbreakable(adjective, strong, hard, firm)
5
well-made(adjective, strong, sound, solid)
4
able-bodied(adjective, strong, sound, solid)
3
heavy-duty(adjective, strong, sound, solid)
3
perduring(adjective, stable, sturdy, constant)
3
staunch(adjective, calm, strong, sound, secure)
3
well-founded(adjective, calm, strong, sound, secure)
2
adamantine(adjective, strong, firm, stiff)
2
big(adjective, strong, sound, solid)
2
hard as nails(expression, adjective, idiom, strong, hard)
2
heavy(adjective, strong, sound, solid)
2
in fine feather(expression, adjective, idiom, strong, sound)
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APASmart Define. (2015). durable thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/durable/thesaurus/synonyms
ChicagoSmart Define. 2015. "durable thesaurus" https://smartdefine.org/durable/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, durable thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/durable/thesaurus/synonyms>.
MLASmart Define. "durable thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/durable/thesaurus/synonyms>