71 entries under hard topic. ×

1
hulk(adjective, strong, substantial, sturdy)
1
hunk(adjective, strong, substantial, sturdy)
1
husky(adjective, strong, determined, substantial)
1
implacable(adjective, mean, tough, firm)
1
indurate(adjective, mean, tough, harsh)
1
iron(adjective, mean, strong, tough)
1
massed(adjective, strong, substantial, sturdy)
1
material(adjective, strong, substantial, sturdy)
1
mean(adjective, tough, harsh, inflexible)
1
perverse(adjective, mean, tough, firm)
1
physical(adjective, strong, substantial, sturdy)
1
pigheaded(adjective, mean, tough, firm)
1
rock(adjective, strong, substantial, sturdy)
1
rocklike(adjective, strong, substantial, sturdy)
1
rooted(adjective, strong, secure, solid)
1
stiff-necked(adjective, mean, tough, firm)
1
thick-skinned(adjective, mean, tough, harsh)
1
tough nut to crack(expression, adjective, idiom, mean)
1
uncompassionate(adjective, mean, tough, harsh)
1
uncooperative(adjective, mean, tough, harsh)
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APASmart Define. (2015). unshakable thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unshakable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unshakable thesaurus" https://smartdefine.org/unshakable/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, unshakable thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unshakable/thesaurus/synonyms>.
MLASmart Define. "unshakable thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/unshakable/thesaurus/synonyms>