- Definitions|2
- Thesaurus|931
- Abbreviations|0
37 entries under dense topic. ×
| firm(adjective, solid) | |
| hidden(adjective, solid) | |
| incognizable(adjective, solid) | |
| indiscernible(adjective, solid) | |
| inexplicable(adjective, solid) | |
| inscrutable(adjective, solid) | |
| mystic(adjective, solid) | |
| sibylline(adjective, solid) | |
| solid(adjective, resistant, impervious) | |
| substantial(adjective, solid) | |
| tightly packed(expression, adjective, solid) | |
| unaccountable(adjective, solid) | |
| unfathomable(adjective, solid) | |
| ungraspable(adjective, solid) | |
| unintelligible(adjective, solid) | |
| unknowable(adjective, solid) | |
| unpiercable(adjective, solid) |
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| APA | Smart Define. (2015). impassable thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/impassable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "impassable thesaurus" https://smartdefine.org/impassable/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, impassable thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/impassable/thesaurus/synonyms>. |
| MLA | Smart Define. "impassable thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/impassable/thesaurus/synonyms> |