213 entries under hard topic. ×

14
iron(adjective, mean, strong, tough)
14
perverse(adjective, mean, tough, firm)
13
bullheaded(adjective, strong, tough, firm)
13
flinty(adjective, strong, tough, severe)
13
harsh(adjective, mean, strong, tough)
13
pigheaded(adjective, mean, tough, firm)
13
solid(adjective, set, strong, sound)
13
stiff-necked(adjective, mean, strong, tough)
12
ruthless(adjective, appearance, mean, strong)
11
strict(adjective, strong, tough, easy)
10
hardheaded(adjective, strong, tough, determined)
10
indomitable(adjective, set, strong, tough)
10
rigorous(adjective, strong, tough, harsh)
10
stony(adjective, mean, firm, harsh)
9
cruel(adjective, appearance, mean, strong)
9
merciless(adjective, appearance, mean, tough)
9
unchangeable(adjective, strong, steady, resolute)
9
unforgiving(adjective, mean, tough, severe)
8
set in stone(expression, adjective, idiom, set, mean)
7
indurate(adjective, set, mean, firm)
10 years ago|23k views|share |citing 
APASmart Define. (2016). unyielding thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unyielding/thesaurus/synonyms
ChicagoSmart Define. 2016. "unyielding thesaurus" https://smartdefine.org/unyielding/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, unyielding thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unyielding/thesaurus/synonyms>.
MLASmart Define. "unyielding thesaurus" 10 March 2016. Web. 29 September 2026. <https://smartdefine.org/unyielding/thesaurus/synonyms>