183 entries under firm topic. ×

14
formal(adjective, tough, correct, severe)
13
grim(adjective, strong, hard, tough, severe)
12
intractable(adjective, tough, persistent, obstinate)
12
steely(adjective, strong, hard, tough)
12
tense(adjective, hard, solid, stiff)
11
incompliant(adjective, tough, severe, resist)
11
scrupulous(adjective, good, hard, complete, tough)
9
close(adjective, hard, tough, correct, severe)
9
punctilious(adjective, close, hard, tough, correct)
9
puritanical(adjective, tough, correct, moderate, severe)
9
stuffy(adjective, tough, correct, moderate, severe)
9
taut(adjective, hard, solid, stiff)
8
stony(adjective, set, hard, solid)
8
pat(adjective, determined, usual, regular)
8
single-minded(adjective, tough, severe, harsh)
7
callous(adjective, set, mean, strong, hard)
7
dour(adjective, hard, tough, severe)
7
hard-line(adjective, strong, hard, tough, severe)
7
pigheaded(adjective, mean, hard, tough)
7
prudish(adjective, tough, correct, severe)
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APASmart Define. (2015). rigid thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/rigid/thesaurus/synonyms
ChicagoSmart Define. 2015. "rigid thesaurus" https://smartdefine.org/rigid/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, rigid thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/rigid/thesaurus/synonyms>.
MLASmart Define. "rigid thesaurus" 3 August 2015. Web. 25 September 2026. <https://smartdefine.org/rigid/thesaurus/synonyms>