- Definitions|2
- Thesaurus|1.5k
- Abbreviations|0
88 entries under solid topic. ×
| packed together(expression, adjective, dense, compressed) | |
| pressed(adjective, tight, dense, compressed) | |
| refractory(hard, rigid) | |
| restricted(adjective, close, short, substantial) | |
| squashed(adjective, dense, compressed) | |
| squeezed(adjective, dense, compressed) | |
| sturdy(hard, rigid) | |
| tightly packed(expression, adjective, dense, impassable) |
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| APA | Smart Define. (2015). impenetrable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/impenetrable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "impenetrable thesaurus" https://smartdefine.org/impenetrable/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, impenetrable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/impenetrable/thesaurus/synonyms>. |
| MLA | Smart Define. "impenetrable thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/impenetrable/thesaurus/synonyms> |