66 entries under hard topic. ×

1
petrified(adjective, firm, solid, stiff)
1
refractory(adjective, tough, firm, solid)
1
rheumatic(adjective, firm, solid, stiff)
1
solidified(adjective, tough, firm, solid)
1
starched(adjective, firm, solid, stiff)
1
starchy(adjective, firm, solid, stiff)
1
stiff as a board(expression, adjective, idiom, firm)
1
taut(adjective, firm, solid, stiff)
1
tense(adjective, firm, solid, stiff)
1
thick(adjective, set, tough, firm)
1
thickened(adjective, firm, solid, stiff)
1
tight(adjective, firm, solid, stiff)
1
ungraceful(adjective, firm, solid, stiff)
1
unsupple(adjective, firm, solid, stiff)
1
wooden(adjective, firm, solid, stiff)
0
close(tough, solid, rigid, inflexible)
0
close-grained(tough, solid, rigid, inflexible)
0
concrete(tough, solid, rigid, inflexible)
0
fine-grained(tough, solid, rigid, inflexible)
0
heavy(tough, solid, rigid, inflexible)
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APASmart Define. (2015). inelastic thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/inelastic/thesaurus/synonyms
ChicagoSmart Define. 2015. "inelastic thesaurus" https://smartdefine.org/inelastic/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, inelastic thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/inelastic/thesaurus/synonyms>.
MLASmart Define. "inelastic thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/inelastic/thesaurus/synonyms>