100 entries under uncompromising topic. ×

15
iron(adjective, mean, strong, hard, tough)
15
pertinacious(adjective, determined, resolute, obstinate, stubborn)
15
pigheaded(adjective, mean, hard, firm, deliberate)
15
unshakeable(adjective, determined, resolute)
13
headstrong(adjective, strong, hard, tough, rough)
13
steely(adjective, strong, hard, tough, firm)
13
uncompliant(adjective, resist, determined, resolute, obstinate)
13
unswayable(adjective, determined, resolute, rigid, obstinate)
12
hidebound(adjective, moderate, severe, firm, determined)
12
remorseless(adjective, harsh, resist, cruel, determined)
12
set in stone(expression, adjective, idiom, mean, hard)
12
unswerving(adjective, strong, smooth, tough, firm)
11
incompliant(adjective, tough, firm, solid, resist)
11
pat(adjective, determined, resolute, obstinate)
11
stiff-necked(adjective, mean, strong, hard, tough)
10
contrary(adjective, determined, resolute, obstinate, stubborn)
10
die-hard(adjective, tough, moderate, resist, determined)
10
hardened(adjective, person, hard, tough, firm)
10
hardheaded(adjective, strong, hard, tough, cold)
10
immutable(adjective, set, hard, secure, rough)
10 years ago|28k views|share |citing 
APASmart Define. (2016). inflexible thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/inflexible/thesaurus/synonyms
ChicagoSmart Define. 2016. "inflexible thesaurus" https://smartdefine.org/inflexible/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, inflexible thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/inflexible/thesaurus/synonyms>.
MLASmart Define. "inflexible thesaurus" 24 March 2016. Web. 30 September 2026. <https://smartdefine.org/inflexible/thesaurus/synonyms>