112 entries under substantial topic. ×

6
heavy(adjective, person, body, strong, hard)
5
enduring(adjective, calm, strong, sound, secure)
5
unshakable(adjective, strong, hard, tough, continue)
4
fixed(adjective, close, strong, hard, sound)
4
lasting(adjective, calm, strong, tough, solid)
4
tight(adjective, close, strong, hard, tough)
4
well-founded(adjective, calm, strong, sound, secure)
3
considerable(adjective, strong, powerful, significant)
3
important(adjective, significant, large, considerable)
3
material(adjective, strong, hard, solid, big)
3
meaningful(adjective, significant, large, considerable)
3
palpable
3
physical(adjective, strong, hard, fit)
3
reliable(adjective, calm, strong, secure, tough)
3
significant(adjective, large, considerable)
3
sure(adjective, calm, strong, tough, continue)
3
united
2
active(adjective, person, strong, sound, tough)
2
actual
2
appreciable
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APASmart Define. (2016). sturdy thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/sturdy/thesaurus/synonyms
ChicagoSmart Define. 2016. "sturdy thesaurus" https://smartdefine.org/sturdy/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, sturdy thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/sturdy/thesaurus/synonyms>.
MLASmart Define. "sturdy thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/sturdy/thesaurus/synonyms>