124 entries under hard topic. ×

2
petrified(adjective, calm, quiet, strong)
2
solidified(adjective, set, firm, solid)
2
stark(adjective, strong, sound, tough)
2
substantial(adjective, strong, sound, tough)
2
taut(adjective, strong, secure, rough)
2
tense(adjective, firm, solid, stiff)
1
annealed(adjective, firm, solid, stiff)
1
arthritic(adjective, firm, solid, stiff)
1
benumbed(verb, adjective, firm, solid)
1
brick wall(expression, adjective, strong, substantial)
1
brittle(adjective, firm, solid, stiff)
1
buckram(adjective, firm, solid, stiff)
1
bullhead(adjective, mean, tough, harsh)
1
chilled(adjective, firm, solid, stiff)
1
cold fish(expression, adjective, mean, stubborn)
1
compact(adjective, set, strong, firm)
1
compacted(adjective, strong, substantial, sturdy)
1
consolidated(adjective, set, solid, heavy)
1
creaky(adjective, firm, solid, stiff)
1
dense(adjective, set, strong, firm)
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APASmart Define. (2016). fixed thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/fixed/thesaurus/synonyms
ChicagoSmart Define. 2016. "fixed thesaurus" https://smartdefine.org/fixed/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, fixed thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/fixed/thesaurus/synonyms>.
MLASmart Define. "fixed thesaurus" 16 March 2016. Web. 22 September 2026. <https://smartdefine.org/fixed/thesaurus/synonyms>