210 entries under hard topic. ×

1
arthritic(adjective, firm, solid, stiff)
1
benumbed(adjective, firm, solid, stiff)
1
bitter(adjective, set, strong, tough)
1
blind to(expression, adjective, careless, indifferent)
1
buckram(adjective, firm, solid, stiff)
1
bullhead(adjective, mean, harsh, stubborn)
1
by the book(expression, adjective, idiom, strong)
1
careless(adjective, indifferent, cruel, apathetic)
1
case-hardened(adjective, careless, indifferent, cruel)
1
cemented(adjective, firm, solid, stiff)
1
chilled(adjective, firm, solid, stiff)
1
cold fish(expression, adjective, mean, stubborn)
1
confirmed(adjective, rough, harsh, certain)
1
congealed(adjective, tough, firm, solid)
1
contracted(adjective, close, firm, solid)
1
creaky(adjective, firm, solid, stiff)
1
deaf to(expression, adjective, careless, indifferent)
1
difficult(adjective, severe, rough, harsh)
1
disciplinary(adjective, strong, tough, severe)
1
disdainful(adjective, hateful, unfeeling, unsympathetic)
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APASmart Define. (2016). inflexible thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/inflexible/thesaurus/synonyms
ChicagoSmart Define. 2016. "inflexible thesaurus" https://smartdefine.org/inflexible/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, inflexible thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/inflexible/thesaurus/synonyms>.
MLASmart Define. "inflexible thesaurus" 24 March 2016. Web. 29 September 2026. <https://smartdefine.org/inflexible/thesaurus/synonyms>