78 entries under hard topic. ×

1
close-grained(adjective, close, set, tough)
1
congealed(adjective, set, tough, firm)
1
fixed(adjective, set, strong, firm)
1
hardened(adjective, set, strong, tough)
1
hefty(adjective, strong, heavy, substantial)
1
husky(adjective, strong, heavy, deep)
1
impervious(adjective, set, tough, solid)
1
jelled(adjective, set, tough, solid)
1
rocklike(adjective, strong, firm, substantial)
1
tough(adjective, set, firm, solid)
1
unshakable(adjective, strong, substantial, tight)
0
adamantine(adjective, set, strong, firm)
0
blubbery(deep, fat, broad, bulky)
0
brick wall(expression, adjective, strong, substantial)
0
broad(deep, fat, bulky)
0
bulky(heavy, deep, sturdy, fat)
0
dimensional(adjective, strong, substantial, tight)
0
fine-grained(solid, rigid)
0
frozen(adjective, dense, rock-hard)
0
hard-bitten
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APASmart Define. (2016). compact thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/compact/thesaurus/synonyms
ChicagoSmart Define. 2016. "compact thesaurus" https://smartdefine.org/compact/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, compact thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/compact/thesaurus/synonyms>.
MLASmart Define. "compact thesaurus" 31 March 2016. Web. 22 September 2026. <https://smartdefine.org/compact/thesaurus/synonyms>