206 entries under rigid topic. ×

7
unadaptable(adjective, set, hard, stiff)
7
undeviating(adjective, strong, smooth, flat, harsh)
6
constant(adjective, strong, secure, moderate, flat)
6
indurate(adjective, mean, hard, firm, determined)
6
ironclad(adjective, set, hard, severe, harsh)
6
steady(adjective, strong, secure, moderate, flat)
6
sturdy(adjective, close, strong, hard, tough)
5
demanding(adjective, hard, severe, rough, difficult)
5
inalterable(adjective, set, certain, limited, definite)
5
narrow(adjective, hard, moderate, rough, firm)
4
changeless(adjective, set, certain, limited, definite)
4
definite(adjective, strong, hard, severe, flat)
4
formal(adjective, strong, severe, fixed, serious)
4
frozen(adjective, hard, firm, solid, stiff)
4
monolithic(adjective, solid, normal, even)
4
ossified(adjective, firm, solid, determined, normal)
4
rocky(adjective, set, strong, hard, firm)
4
rough(adjective, person, strong, hard, tough)
4
straight(adjective, direct, right, moderate, level)
4
taut(adjective, hard, rough, firm, harsh)
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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>