116 entries under tough topic. ×

19
hard(adjective, mean, strong, severe)
16
grim(adjective, strong, hard, severe)
16
severe(adjective, clear, strong, hard)
15
hard-nosed(adjective, mean, clear, strong, hard)
14
dogged(adjective, mean, hard, firm)
14
stern(adjective, hard, severe, rough)
12
intractable(adjective, hard, rough, firm)
12
iron(adjective, mean, strong, hard)
12
remorseless(adjective, harsh, resist, cruel)
12
steely(adjective, strong, hard, firm)
10
harsh(adjective, mean, strong, hard)
10
stiff-necked(adjective, mean, strong, hard)
10
strict(adjective, strong, hard, severe)
8
rigorous(adjective, strong, hard, severe)
7
headstrong(adjective, hard, rough, harsh)
7
mulish(adjective, mean, strong, hard)
7
perverse(adjective, mean, hard, determined)
7
staunch(adjective, clear, strong, severe)
6
callous(adjective, hard, rough, harsh)
6
cruel(adjective, strong, hard, severe)
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APASmart Define. (2016). unbending thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/unbending/thesaurus/synonyms
ChicagoSmart Define. 2016. "unbending thesaurus" https://smartdefine.org/unbending/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, unbending thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/unbending/thesaurus/synonyms>.
MLASmart Define. "unbending thesaurus" 24 March 2016. Web. 20 September 2026. <https://smartdefine.org/unbending/thesaurus/synonyms>