561 entries under adjective topic. ×

8
hard-line(strong, hard, tough, severe)
8
merciless(person, hard, rough, harsh)
8
pig-headed(determined, resolute, obstinate, stubborn)
8
single-minded(tough, firm, harsh, cruel)
8
strong-willed(determined, resolution, resolute, uncompromising)
8
unchanging(moderate, severe, firm, harsh)
7
bigoted(determined, resolute, rigid, obstinate)
7
cruel(strong, hard, tough, severe)
7
dour(severe, severity)
7
hanging tough(expression, mean, hard, determined)
7
hard-boiled(person, mean, strong, hard)
7
indomitable(set, strong, hard, tough)
7
intolerant(set, severe, fixed, rigid)
7
pitiless(severe, harsh, cruel, determined)
7
precise(hard, severe, rough, difficult)
7
recalcitrant(tough, firm, unreasonable, fixed)
7
resistant(hard, firm, determined, resolute)
7
rock-ribbed(determined, resolute, uncompromising, unshakeable)
7
self-willed(tough, firm, determined, resolute)
7
tight(close, strong, hard, tough)
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>