Synonyms|108Antonyms|10|Broader|0Narrower|0Related|162

30 entries under hard topic. ×

1
jelled(tough, solid, rigid, inflexible)
1
refractory(tough, solid, rigid, inflexible)
1
set(tough, solid, rigid, inflexible)
1
solidified(tough, solid, rigid, inflexible)
1
stiff(tough, solid, rigid, inflexible)
1
sturdy(tough, solid, rigid, inflexible)
1
unyielding(tough, solid, rigid, inflexible)
0
inflexible(tough, solid, rigid)
0
rigid(tough, solid, inflexible)
0
tough(solid, rigid, inflexible)
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APASmart Define. (2015). nonporous thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/nonporous/thesaurus/synonyms
ChicagoSmart Define. 2015. "nonporous thesaurus" https://smartdefine.org/nonporous/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, nonporous thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/nonporous/thesaurus/synonyms>.
MLASmart Define. "nonporous thesaurus" 14 April 2015. Web. 30 September 2026. <https://smartdefine.org/nonporous/thesaurus/synonyms>