- Definitions|2
- Thesaurus|1.5k
- Abbreviations|0
125 entries under dense topic. ×
| unpiercable | |
| vitrified(adjective, set, solid, heavy, deep) | |
| abundant | |
| appressed(adjective, solid, tight, compressed) | |
| brimming | |
| bristling | |
| bunched(adjective, solid, tight, compressed) | |
| bursting | |
| bushy | |
| chock-full | |
| circumscribed(adjective, close, solid, short, substantial) | |
| confined(adjective, close, solid, short, substantial) | |
| confining(adjective, close, solid, short, substantial) | |
| considerable | |
| copious | |
| covered | |
| cramped(adjective, solid, compact, tight) | |
| crawling with(expression, profuse) | |
| cropped(adjective, close, solid, short, substantial) | |
| dirty(dark, gloomy, dreary, cloudy) |
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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> |