22 entries under tough topic. ×

4
close-grained(adjective, hard, solid, rigid)
1
close(hard, solid, rigid, inflexible)
1
compressed(hard, solid, rigid, inflexible)
1
concentrated(hard, solid, rigid, inflexible)
1
concrete(hard, solid, rigid, inflexible)
1
condensed(hard, solid, rigid, inflexible)
1
congealed(hard, solid, rigid, inflexible)
1
hardened(hard, solid, rigid, inflexible)
1
impervious(hard, solid, rigid, inflexible)
1
inelastic(hard, solid, rigid, inflexible)
1
jelled(hard, solid, rigid, inflexible)
1
nonporous(hard, solid, rigid, inflexible)
1
refractory(hard, solid, rigid, inflexible)
1
set(hard, solid, rigid, inflexible)
1
solidified(hard, solid, rigid, inflexible)
1
stiff(hard, solid, rigid, inflexible)
1
sturdy(hard, solid, rigid, inflexible)
1
unyielding(hard, solid, rigid, inflexible)
0
hard(solid, rigid, inflexible)
0
heavy(hard, solid, rigid, inflexible)
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APASmart Define. (2015). fine-grained thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/fine-grained/thesaurus/synonyms
ChicagoSmart Define. 2015. "fine-grained thesaurus" https://smartdefine.org/fine-grained/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, fine-grained thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/fine-grained/thesaurus/synonyms>.
MLASmart Define. "fine-grained thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/fine-grained/thesaurus/synonyms>