128 entries under hard topic. ×

5
strong(adjective, person, set, body)
4
cohesive(adjective, strong, solid, stiff)
4
compacted(adjective, set, strong, firm)
4
consolidated(adjective, set, strong, firm)
4
massed(adjective, full, compact, thick)
4
nonporous(solid, rigid, resistant, impervious)
4
rugged(adjective, set, strong, tough)
4
stable(adjective, close, strong, firm)
4
stony(adjective, set, strong, firm)
3
flinty(adjective, strong, tough, solid)
3
inflexible(adjective, close, set, strong)
3
obdurate(adjective, strong, tough, sturdy)
3
physical(adjective, strong, solid, substantial)
3
rocklike(adjective, strong, firm, substantial)
3
solidified(adjective, set, tough, solid)
3
steely(adjective, strong, tough, sturdy)
3
sturdy(adjective, person, close, set, body)
2
adamantine(adjective, set, strong, tough)
2
brawny(adjective, person, body, strong)
2
congealed(adjective, set, tough, solid)
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APASmart Define. (2015). dense thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/dense/thesaurus/synonyms
ChicagoSmart Define. 2015. "dense thesaurus" https://smartdefine.org/dense/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, dense thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/dense/thesaurus/synonyms>.
MLASmart Define. "dense thesaurus" 17 July 2015. Web. 23 September 2026. <https://smartdefine.org/dense/thesaurus/synonyms>