26 entries under reserved topic. ×

4
stiff(adjective, hard, tough, firm, rigid)
2
inelastic(adjective, hard, tough, firm, solid)
2
inflexible(adjective, hard, tough, firm, solid)
2
intractable(adjective, tough, firm, fixed, distant)
2
rigid(adjective, hard, tough, firm, solid)
2
unyielding(adjective, hard, tough, firm, solid)
1
crisp(adjective, tough, firm, fixed, distant)
1
distant(adjective, tough, firm, fixed, rigid)
1
do or die(expression, adjective, idiom, tough, firm)
1
dug in(expression, adjective, tough, firm, distant)
1
firm(adjective, hard, tough, solid, rigid)
1
formal(adjective, tough, firm, fixed, distant)
1
hard as nails(expression, adjective, idiom, tough, firm)
1
hold the fort(expression, adjective, idiom, tough, firm)
1
hold the line(expression, adjective, idiom, tough, firm)
1
incompliant(adjective, hard, tough, firm, solid)
1
inexorable(adjective, tough, firm, fixed, distant)
1
locked in(expression, adjective, tough, firm, distant)
1
obstinate(adjective, tough, firm, fixed, rigid)
1
resolute(adjective, tough, firm, fixed, distant)
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APASmart Define. (2015). unflexible thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/unflexible/thesaurus/synonyms
ChicagoSmart Define. 2015. "unflexible thesaurus" https://smartdefine.org/unflexible/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, unflexible thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/unflexible/thesaurus/synonyms>.
MLASmart Define. "unflexible thesaurus" 9 December 2015. Web. 27 September 2026. <https://smartdefine.org/unflexible/thesaurus/synonyms>