6
thick(adjective, firm, dense, density)
4
compact(adjective, firm, dense, density)
4
hard(adjective, strong, firm, resist, density)
4
impenetrable(adjective, firm, dense, density)
3
concrete(adjective, firm, density)
3
solid(adjective, strong, firm, resist, density)
2
close(adjective, firm, density)
2
dense(adjective, firm, density)
2
firm(adjective, strong, resist)
2
nonporous(adjective, firm, density)
2
set(adjective, firm)
2
solidified(adjective, firm, density)
2
stiff(adjective, firm)
2
substantial(adjective, firm, density)
1
close-grained(adjective, firm)
1
coherent
1
cohesive
1
concentrated(adjective, firm)
1
condensed(adjective, firm)
1
constipated
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APASmart Define. (2013). incompressible thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/incompressible/thesaurus/synonyms
ChicagoSmart Define. 2013. "incompressible thesaurus" https://smartdefine.org/incompressible/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2013, incompressible thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/incompressible/thesaurus/synonyms>.
MLASmart Define. "incompressible thesaurus" 28 June 2013. Web. 20 September 2026. <https://smartdefine.org/incompressible/thesaurus/synonyms>