226 entries under hard topic. ×

7
dour(adjective, tough, severe, firm)
7
hard-line(adjective, strong, tough, severe)
7
immutable(adjective, set, regular, fixed)
7
pigheaded(adjective, mean, tough, firm)
6
buckram(adjective, firm, solid, stiff)
6
cold(adjective, cool, severe, harsh)
6
correct(adjective, severe, rough, difficult)
6
dense(adjective, set, strong, tough)
6
frozen(adjective, firm, solid, fixed)
6
indurate(adjective, mean, firm, determined)
6
oppressive(adjective, tough, severe, rough)
6
proper(adjective, correct, severe, rough)
6
stark(adjective, severe, firm, solid)
6
unadaptable(adjective, set, stiff, resolute)
6
unbreakable(adjective, strong, severe, firm)
6
wooden(adjective, correct, firm, solid)
5
difficult(adjective, tough, severe, rough)
5
hardened(adjective, strong, tough, firm)
5
ironclad(adjective, set, severe, cruel)
5
sharp(adjective, correct, severe, rough)
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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>