173 entries under determined topic. ×

7
resistant(adjective, hard, firm, resolute)
7
rock-ribbed(adjective, resolute, uncompromising, unshakeable)
7
self-willed(adjective, tough, firm, resolute)
7
tight(adjective, close, strong, hard, tough)
7
undeviating(adjective, strong, smooth, flat, harsh)
7
wilful(adjective, resolute, uncompromising, unshakeable)
6
constant(adjective, strong, secure, moderate, flat)
6
contumacious(adjective, tough, firm, unreasonable)
6
indurate(adjective, mean, hard, firm)
6
persevering(adjective, strong, tough, flat, firm)
6
steady(adjective, strong, secure, moderate, flat)
6
sturdy(adjective, close, strong, hard, tough)
6
unflinching(adjective, strong, flat, firm, harsh)
6
unmoved(adjective, fixed, stubborn)
6
willful(adjective, tough, firm, resolute)
5
bovine(adjective, resolute, obstinate, uncompromising)
5
brass-bound(adjective, resolute, obstinate, uncompromising)
5
ruthless(adjective, hard, rough, harsh, cruel)
5
true(adjective, strong, smooth, tough, flat)
4
bullheaded(adjective, strong, hard, tough, firm)
10 years ago|28k views|share |citing 
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>