233 entries under solid topic. ×

2
physical(adjective, strong, hard, substantial)
2
safe(adjective, calm, clear, strong, secure)
2
steeled(verb, adjective, firm, hardened)
2
sturdy(adjective, calm, strong, hard, tough)
2
taut(adjective, strong, hard, firm)
2
unfluctuating(adjective, calm, strong, secure, firm)
2
vitrified(adjective, close, fix, firm)
1
absolutely certain(expression, adjective, certain, sure)
1
annealed(verb, adjective, hard, firm)
1
ardent(adjective, firm, true, stable)
1
arthritic(adjective, hard, firm, stiff)
1
austere(adjective, tough, severe, firm, honest)
1
benumbed(adjective, hard, firm, stiff)
1
beyond doubt(expression, adjective, certain, fixed)
1
brick-wall(adjective, calm, strong, secure, severe)
1
brick wall(expression, adjective, calm, strong, hard)
1
buckram(adjective, hard, firm, stiff)
1
buttoned down(expression, adjective, strong, stable)
1
caked(adjective, firm, heavy, deep)
1
calm(verb, adjective, fix, strong, secure)
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APASmart Define. (2016). set thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/set/thesaurus/synonyms
ChicagoSmart Define. 2016. "set thesaurus" https://smartdefine.org/set/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, set thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/set/thesaurus/synonyms>.
MLASmart Define. "set thesaurus" 1 March 2016. Web. 21 September 2026. <https://smartdefine.org/set/thesaurus/synonyms>