125 entries under solid topic. ×

3
heavy(adjective, strong, hard, sound, tough)
3
impliable(adjective, hard, firm, resolute)
3
solidified(adjective, set, hard, tough, firm)
3
taut(adjective, hard, rough, firm, harsh)
3
vigorous(adjective, strong, hard, sound, tough)
2
brittle(adjective, hard, firm, rigid)
2
close(adjective, set, strong, hard, tough)
2
concentrated(adjective, set, hard, tough, firm)
2
congealed(adjective, set, hard, tough, firm)
2
energetic(adjective, strong, sound, tough)
2
frozen(adjective, hard, firm, stiff)
2
hard and fast(expression, adjective, idiom, firm)
2
hardy(adjective, strong, hard, sound, tough)
2
hearty(adjective, strong, sound, tough)
2
secure(adjective, close, strong, hard, sound)
2
starched(adjective, hard, firm, stiff)
2
thick(adjective, strong, hard, tough, firm)
2
unflexible(adjective, hard, tough, firm)
2
well-built(adjective, strong, sound, tough)
2
well-founded(adjective, strong, sound, tough)
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APASmart Define. (2016). unyielding thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unyielding/thesaurus/synonyms
ChicagoSmart Define. 2016. "unyielding thesaurus" https://smartdefine.org/unyielding/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, unyielding thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unyielding/thesaurus/synonyms>.
MLASmart Define. "unyielding thesaurus" 10 March 2016. Web. 26 September 2026. <https://smartdefine.org/unyielding/thesaurus/synonyms>