82 entries under strict topic. ×

6
flinty(adjective, close, strong, hard, tough)
6
hidebound(adjective, close, severe, firm, determined)
6
pigheaded(adjective, mean, hard, tough, determined)
6
tenacious(adjective, clear, strong, tough, severe)
6
undeviating(adjective, strong, flat, harsh, certain)
5
austere(adjective, strong, hard, tough, severe)
5
persevering(adjective, strong, tough, flat, firm)
5
pitiless(adjective, severe, harsh, cruel, determined)
5
strong(adjective, close, hard, tough, flat)
5
unfeeling(adjective, hard, tough, severe, harsh)
4
cold(adjective, close, hard, cool, severe)
4
immutable(adjective, hard, firm, rigid, inflexible)
4
single-minded(adjective, tough, harsh, cruel, determined)
4
unalterable(set, strong, hard, severe, definite)
3
definite(adjective, strong, flat, firm, certain)
3
intense(adjective, clear, tough, severe, harsh)
3
serious(adjective, close, strong, hard, tough)
3
unadaptable(adjective, hard, rigid, inflexible)
3
unsparing(adjective, close, strong, hard, tough)
2
astringent(adjective, close, strong, hard, tough)
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APASmart Define. (2016). unbending thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unbending/thesaurus/synonyms
ChicagoSmart Define. 2016. "unbending thesaurus" https://smartdefine.org/unbending/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, unbending thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unbending/thesaurus/synonyms>.
MLASmart Define. "unbending thesaurus" 24 March 2016. Web. 28 September 2026. <https://smartdefine.org/unbending/thesaurus/synonyms>