- Definitions|2
- Thesaurus|437
- Abbreviations|0
53 entries under solid topic. ×
| impenetrable(adjective, close, hard, tough) | |
| impervious(adjective, hard, fast, short) | |
| tight(adjective, close, short, substantial) | |
| compact(adjective, close, set, hard, tough) | |
| close(adjective, set, hard, tough) | |
| dense(adjective, set, hard, tough, firm) | |
| impassable(adjective, dense, unaffected, unyielding) | |
| thick(adjective, close, set, hard, tough) | |
| firm(adjective, close, hard, fast) | |
| nonporous(adjective, hard, rigid, resistant) | |
| concrete(hard, rigid, density) | |
| hard(adjective, set, tough, firm) | |
| heavy(adjective, hard, rigid) | |
| substantial(adjective, close, set, hard, tough) | |
| compacted(adjective, dense, compressed) | |
| compressed(adjective, set, hard, tough, firm) | |
| concentrated(adjective, set, hard, tough, firm) | |
| condensed(adjective, set, hard, tough, firm) | |
| congested(adjective, close, short, substantial) | |
| consolidated(adjective, close, short, substantial) |
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| APA | Smart Define. (2015). impermeable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/impermeable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "impermeable thesaurus" https://smartdefine.org/impermeable/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, impermeable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/impermeable/thesaurus/synonyms>. |
| MLA | Smart Define. "impermeable thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/impermeable/thesaurus/synonyms> |