103 entries under hard topic. ×

6
callous(adjective, person, mean, rough)
6
hardheaded(adjective, strong, tough, determined)
6
set in stone(expression, adjective, idiom, mean)
5
bullheaded(adjective, strong, tough, firm)
5
immutable(adjective, firm, fixed, inflexible)
5
merciless(adjective, person, mean, rough)
5
unalterable(adjective, strong, secure, severe)
5
unsympathetic(adjective, mean, tough, harsh)
4
austere(adjective, strong, tough, severe)
4
hanging tough(expression, adjective, mean, determined)
4
hard-boiled(adjective, person, mean, strong)
4
hard-hearted(adjective, mean, tough, harsh)
4
steel(adjective, strong, strength, tough)
4
unfeeling(adjective, mean, tough, harsh)
3
indurate(adjective, mean, resolute, inflexible)
3
ruthless(adjective, mean, rough, harsh)
3
strong(adjective, tough, flat, firm)
3
unadaptable(adjective, resolute, rigid, inflexible)
3
uncompassionate(adjective, person, mean, feelings)
2
hard-core(adjective, strong, tough, firm)
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APASmart Define. (2016). adamant thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/adamant/thesaurus/synonyms
ChicagoSmart Define. 2016. "adamant thesaurus" https://smartdefine.org/adamant/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, adamant thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/adamant/thesaurus/synonyms>.
MLASmart Define. "adamant thesaurus" 23 March 2016. Web. 28 September 2026. <https://smartdefine.org/adamant/thesaurus/synonyms>