71 entries under hard topic. ×

33
solid(adjective, set, tough, correct)
18
substantial(adjective, body, tough, solid)
16
firm(noun, verb, adjective, close, set)
15
material(noun, adjective, body, strong)
14
physical(adjective, body, strong, solid)
13
set(verb, adjective, close, strong)
11
dense(adjective, set, tough, solid)
10
compact(verb, adjective, close, set)
7
compressed(adjective, set, tough, firm)
6
strong(adjective, set, firm, physical)
6
thick(adjective, set, strong, tough)
5
close(verb, adjective, set, tough)
5
unyielding(adjective, set, tough, firm)
4
impenetrable(adjective, set, tough, solid)
4
solidified(adjective, set, tough, firm)
4
tough(adjective, solid, rigid, inflexible)
3
condensed(adjective, set, tough, solid)
3
consolidated(adjective, set, firm, solid)
3
fixed(adjective, set, strong, solid)
3
impermeable(solid, rigid, density)
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APASmart Define. (2016). concrete thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/concrete/thesaurus/synonyms
ChicagoSmart Define. 2016. "concrete thesaurus" https://smartdefine.org/concrete/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, concrete thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/concrete/thesaurus/synonyms>.
MLASmart Define. "concrete thesaurus" 31 March 2016. Web. 25 September 2026. <https://smartdefine.org/concrete/thesaurus/synonyms>