65 entries under solid topic. ×
| dense(hard, rigid) | |
| fine-grained(hard, tough, rigid, inflexible) | |
| impenetrable(hard, rigid) | |
| impermeable(hard, rigid) | |
| nonporous(hard, tough, rigid, inflexible) |
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Refractory on
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| APA | Smart Define. (2015). refractory thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/refractory/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "refractory thesaurus" https://smartdefine.org/refractory/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, refractory thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/refractory/thesaurus/synonyms>. |
| MLA | Smart Define. "refractory thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/refractory/thesaurus/synonyms> |