147 entries under sturdy topic. ×

9
resolute(adjective, strong, secure, easy, flat)
9
safe(adjective, good, strong, complete, secure)
9
tough(adjective, strong, sound, firm, heavy)
8
abiding(adjective, quality, strong, tough, flat)
8
changeless(adjective, smooth, right, firm, solid)
7
certain(adjective, good, strong, easy, firm)
6
powerful(adjective, strong, sound, tough, solid)
6
stalwart(adjective, strong, sound, tough, firm)
6
unshakable(adjective, strong, hard, secure, continue)
5
hardy(adjective, strong, sound, tough, solid)
5
hearty(adjective, strong, sound, complete, tough)
5
long-lasting(adjective, tough, constant, enduring)
5
poised(adjective, calm, quiet, easy, firm)
5
sensible(adjective, sound, reasonable, moderate, firm)
5
tenacious(adjective, strong, sound, secure, tough)
5
unswerving(adjective, firm, solid, fixed, resolute)
5
vigorous(adjective, strong, sound, complete, tough)
5
well-founded(adjective, strong, sound, secure, tough)
4
cool(adjective, calm, quiet, sound, reasonable)
4
hale(adjective, strong, sound, complete, tough)
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APASmart Define. (2015). stable thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/stable/thesaurus/synonyms
ChicagoSmart Define. 2015. "stable thesaurus" https://smartdefine.org/stable/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, stable thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/stable/thesaurus/synonyms>.
MLASmart Define. "stable thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/stable/thesaurus/synonyms>