183 entries under firm topic. ×

4
compressed(adjective, set, strong, hard, tough)
4
contumacious(adjective, tough, persistent, obstinate)
4
recalcitrant(adjective, tough, persistent, obstinate)
4
square(adjective, tough, moderate, severe)
4
starched(adjective, hard, solid, stiff)
4
thick(adjective, strong, hard, tough)
4
unsparing(adjective, strong, hard, tough, severe)
4
uptight(adjective, tough, moderate, severe)
3
cussed(adjective, severe, unreasonable, grim)
3
customary(adjective, determined, usual, regular)
3
graceless(adjective, hard, solid, stiff)
3
impenetrable(adjective, set, strong, hard, tough)
3
located(secure, solid, stiff, inflexible)
3
opinionated(adjective, tough, unreasonable, inflexible)
3
rooted(adjective, secure, determined, usual)
3
self-willed(adjective, tough, inflexible, obstinate)
3
straight(adjective, tough, correct, moderate, severe)
3
unmovable(adjective, cruel, fixed, resolute)
2
bound(adjective, harsh, cruel, determined)
2
brittle(adjective, hard, solid, stiff)
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APASmart Define. (2015). rigid thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/rigid/thesaurus/synonyms
ChicagoSmart Define. 2015. "rigid thesaurus" https://smartdefine.org/rigid/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, rigid thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/rigid/thesaurus/synonyms>.
MLASmart Define. "rigid thesaurus" 3 August 2015. Web. 26 September 2026. <https://smartdefine.org/rigid/thesaurus/synonyms>