43 entries under tight topic. ×

1
indurate(adjective, hard, firm, solid, tense)
1
inelastic(adjective, hard, tough, firm, solid)
1
jelled(adjective, hard, tough, firm, solid)
1
mechanical(adjective, hard, firm, solid, tense)
1
numbed(adjective, hard, firm, solid, tense)
1
ossified(adjective, hard, firm, solid, tense)
1
petrified(adjective, hard, firm, solid, tense)
1
rheumatic(adjective, hard, firm, solid, tense)
1
solid(adjective, hard, tough, firm, tense)
1
solidified(adjective, hard, tough, firm, solid)
1
starched(adjective, hard, firm, solid, stiff)
1
starchy(adjective, hard, firm, solid, tense)
1
stark(adjective, hard, firm, solid, tense)
1
steely(adjective, hard, firm, solid, tense)
1
stiff as a board(expression, adjective, idiom, firm, solid)
1
taut(adjective, hard, rough, firm, harsh)
1
tense(adjective, hard, firm, solid, stiff)
1
thick(adjective, set, hard, tough, firm)
1
thickened(adjective, hard, firm, solid, tense)
1
unflexible(adjective, hard, firm, solid, tense)
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APASmart Define. (2015). refractory thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/refractory/thesaurus/synonyms
ChicagoSmart Define. 2015. "refractory thesaurus" https://smartdefine.org/refractory/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, refractory thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/refractory/thesaurus/synonyms>.
MLASmart Define. "refractory thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/refractory/thesaurus/synonyms>