- Definitions|2
- Thesaurus|437
- Abbreviations|0
21 entries under close topic. ×
| impenetrable(adjective, hard, tough, solid) | |
| tight(adjective, solid, short, substantial) | |
| compact(adjective, set, hard, tough) | |
| thick(adjective, set, hard, tough) | |
| firm(adjective, hard, solid, fast) | |
| solid(adjective, set, hard, tough) | |
| substantial(adjective, set, hard, tough) | |
| congested(adjective, solid, short, substantial) | |
| consolidated(adjective, solid, short, substantial) | |
| crowded(adjective, solid, short, substantial) | |
| jam-packed(adjective, solid, short, substantial) | |
| packed(adjective, solid, short, substantial) | |
| close-grained(adjective, set, hard, tough) | |
| short(adjective, solid, fast, substantial) | |
| circumscribed(adjective, solid, short, substantial) | |
| confined(adjective, solid, short, substantial) | |
| confining(adjective, solid, short, substantial) | |
| cropped(adjective, solid, short, substantial) | |
| narrow(adjective, solid, short, substantial) | |
| neck and neck |
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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> |