66 entries under rigid topic. ×
| condensed(hard, tough, solid, inflexible) | |
| dense(hard, solid) | |
| fine-grained(hard, tough, solid, inflexible) | |
| impenetrable(hard, solid) | |
| impermeable(hard, solid) | |
| nonporous(hard, tough, solid, inflexible) |
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Refractory on
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| APA | Smart Define. (2015). refractory thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/refractory/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "refractory thesaurus" https://smartdefine.org/refractory/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, refractory thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/refractory/thesaurus/synonyms>. |
| MLA | Smart Define. "refractory thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/refractory/thesaurus/synonyms> |