263 entries under tough topic. ×

11
recalcitrant(adjective, firm, determined, fixed)
11
strict(adjective, strong, hard, easy)
10
hardheaded(adjective, strong, hard, determined)
10
indomitable(adjective, set, strong, hard)
10
rigorous(adjective, strong, hard, harsh)
10
willful(adjective, strong, firm, violent)
9
cruel(adjective, appearance, mean, strong, hard)
9
merciless(adjective, appearance, mean, hard)
9
self-willed(adjective, firm, determined, resolute)
9
unforgiving(adjective, mean, hard, severe)
8
persevering(adjective, strong, flat, firm)
8
set in stone(expression, adjective, idiom, set, mean)
7
contumacious(adjective, firm, determined, fixed)
7
pitiless(adjective, mean, hard, severe)
7
sturdy(adjective, set, strong, hard, sound)
7
unruly(adjective, difficult, unpleasant, determined)
6
austere(adjective, appearance, strong, hard)
6
authoritarian(adjective, strong, hard, severe)
6
demanding(adjective, hard, easy, severe)
6
difficult(adjective, hard, severe, wild)
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APASmart Define. (2016). unyielding thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/unyielding/thesaurus/synonyms
ChicagoSmart Define. 2016. "unyielding thesaurus" https://smartdefine.org/unyielding/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, unyielding thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/unyielding/thesaurus/synonyms>.
MLASmart Define. "unyielding thesaurus" 10 March 2016. Web. 30 September 2026. <https://smartdefine.org/unyielding/thesaurus/synonyms>