210 entries under hard topic. ×

7
tight(adjective, close, strong, tough)
7
unadaptable(adjective, set, stiff, rigid)
6
indurate(adjective, mean, firm, determined)
6
ironclad(adjective, set, severe, harsh)
6
sturdy(adjective, close, strong, tough)
5
authoritarian(adjective, strong, tough, severe)
5
demanding(adjective, severe, rough, difficult)
5
hard-hearted(adjective, mean, harsh, stubborn)
5
narrow(adjective, moderate, rough, firm)
5
ruthless(adjective, rough, harsh, cruel)
5
unresponsive(adjective, person, careless, indifferent)
5
unsparing(adjective, strong, tough, severe)
4
bullheaded(adjective, strong, tough, firm)
4
cold(adjective, strong, severe, harsh)
4
definite(adjective, strong, severe, flat)
4
frozen(adjective, firm, solid, stiff)
4
hard-core(adjective, strong, tough, severe)
4
heartless(adjective, mean, harsh, careless)
4
rocky(adjective, set, strong, firm)
4
rough(adjective, person, strong, tough)
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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>