- Definitions|2
- Thesaurus|1.5k
- Abbreviations|0
125 entries under dense topic. ×
| congested(adjective, close, solid, short, substantial) | |
| consolidated(adjective, close, set, firm, solid) | |
| crammed(profuse, packed, crowded, jam-packed) | |
| great | |
| incompressible(adjective, firm, density) | |
| jam-packed(adjective, close, strong, solid, short) | |
| misty(dark, gloomy, cloudy, impervious) | |
| rank | |
| smoky(adjective, dark, gloomy, dirty, dreary) | |
| solidified(adjective, set, hard, tough, solid) | |
| stiff(adjective, set, hard, tough, firm) | |
| bulletproof | |
| caked(adjective, set, solid, heavy, deep) | |
| clabbered(adjective, set, solid, heavy, deep) | |
| close-grained(adjective, close, set, hard, tough) | |
| clotted(adjective, set, solid, heavy, deep) | |
| coagulated(adjective, set, solid, heavy, deep) | |
| congealed(adjective, set, hard, tough, solid) | |
| curdled(adjective, set, solid, heavy, deep) | |
| darkened(dark, gloomy, cloudy, misty) |
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| APA | Smart Define. (2015). impenetrable thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/impenetrable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "impenetrable thesaurus" https://smartdefine.org/impenetrable/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, impenetrable thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/impenetrable/thesaurus/synonyms>. |
| MLA | Smart Define. "impenetrable thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/impenetrable/thesaurus/synonyms> |