120 entries under harsh topic. ×

4
authoritarian(adjective, strong, hard, tough, severe)
4
hard-core(adjective, strong, hard, tough, severe)
4
hard-hearted(adjective, mean, hard, inflexible)
4
intense(adjective, complete, severe, total)
4
mean(adjective, hard, severe, bleak)
4
merciless(adjective, cruel, determined, fierce)
4
rugged(adjective, strong, hard, tough, severe)
4
ruthless(adjective, severe, cruel, determined)
4
square(adjective, tough, moderate, severe, firm)
4
unflinching(adjective, cruel, determined, fierce)
4
unforgiving(adjective, cruel, determined, fierce)
4
unsparing(adjective, strong, hard, tough, severe)
4
uptight(adjective, tough, moderate, severe, firm)
3
bleak(adjective, hard, severe, sharp, flat)
3
flat(adjective, hard, severe, sharp, rough)
3
serious(adjective, strong, hard, tough, severe)
3
straight(adjective, tough, correct, moderate, severe)
2
bitter(adjective, set, strong, hard, tough)
2
bound(adjective, firm, cruel, determined)
2
brutal(adjective, hard, 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>