238 entries under severe topic. ×

5
ironclad(adjective, set, hard, cruel)
5
sharp(adjective, hard, correct, rough)
5
unfeeling(adjective, mean, hard, cool)
5
unsympathetic(adjective, mean, hard, harsh)
4
astringent(adjective, strong, hard, tough)
4
authoritarian(adjective, strong, hard, tough)
4
chilly(adjective, cool, cold, detached)
4
disciplined
4
dry
4
hard-core(adjective, strong, hard, tough)
4
intense(adjective, complete, total, harsh)
4
mean(adjective, hard, harsh, bleak)
4
rugged(adjective, strong, hard, tough)
4
ruthless(adjective, harsh, cruel, determined)
4
square(adjective, tough, moderate, firm)
4
unkind(adjective, bleak, stark, austere)
4
unsparing(adjective, strong, hard, tough)
4
uptight(adjective, tough, moderate, firm)
3
bleak(adjective, hard, sharp, flat)
3
cussed(adjective, firm, unreasonable, grim)
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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>