147 entries under sturdy topic. ×

4
imperturbable(adjective, calm, smooth, firm, solid)
4
intact(complete, clean, solid, pure, vigorous)
4
sober(adjective, calm, quiet, sound, reasonable)
4
unfaltering(adjective, firm, solid, steady, regular)
4
vital(adjective, strong, complete, solid, vigorous)
4
well-built(adjective, strong, sound, tough, firm)
3
able-bodied(adjective, strong, sound, tough, solid)
3
concrete(adjective, strong, hard, solid, physical)
3
energetic(adjective, strong, sound, tough, solid)
3
husky(adjective, strong, hard, substantial)
3
mighty(adjective, strong, sound, tough, solid)
3
muscular(adjective, strong, sound, tough, solid)
3
perdurable(adjective, tough, steady, fixed)
3
serene(adjective, calm, quiet, smooth, soft)
3
sinewy(adjective, strong, sound, tough, solid)
3
single-minded(adjective, firm, solid, fixed, resolute)
3
steady-going(adjective, continue, firm, solid, steady)
3
well-constructed(complete, solid, vigorous)
3
well-made(adjective, strong, sound, tough, solid)
2
heavy(adjective, strong, hard, sound, 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>