103 entries under firm topic. ×

3
in fine fettle(expression, adjective, idiom, strong, tough)
3
reliable(adjective, calm, strong, secure, tough)
3
sure(adjective, calm, strong, tough, continue)
2
adamant(adjective, strong, hard, tough)
2
close(adjective, set, strong, hard, tough)
2
compact(adjective, close, set, strong, hard)
2
cool(adjective, solid, stable, fixed)
2
immovable(adjective, strong, hard, tough)
2
indefatigable(adjective, strong, sound, tough, fit)
2
intense(adjective, strong, great, tough)
2
set(adjective, calm, strong, hard, tough)
2
solid as a rock(expression, adjective, idiom, calm, strong)
2
thick(adjective, person, close, set, body)
2
unbending(adjective, close, strong, hard, tough)
2
unchangeable(adjective, calm, strong, secure)
2
unshaken(adjective, solid, stable, fixed)
1
abiding(adjective, calm, strong, secure, tough)
1
able(adjective, strong, sound, tough, fit)
1
balanced(adjective, calm, strong, secure)
1
brick-wall(adjective, calm, strong, secure)
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APASmart Define. (2016). sturdy thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/sturdy/thesaurus/synonyms
ChicagoSmart Define. 2016. "sturdy thesaurus" https://smartdefine.org/sturdy/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, sturdy thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/sturdy/thesaurus/synonyms>.
MLASmart Define. "sturdy thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/sturdy/thesaurus/synonyms>