- Definitions|2
- Thesaurus|716
- Abbreviations|0
22 entries under expression topic. ×
| proof against(verb, phrasal verb, strength, safety) | |
| buttoned up(adjective, secure, safe, snug) | |
| free from danger(idiom, secure, safe, snug) | |
| in safety(adjective, secure, safe, snug) | |
| out of danger(idiom, secure, safe, snug) | |
| safe and sound(idiom, secure, safe, snug) | |
| sitting pretty(adjective, secure, safe, snug) | |
| under lock and key(idiom, secure, safe, snug) | |
| all powerful(idiom, strength) | |
| all sufficient(idiom, strength) | |
| buttoned down(adjective, safe, sheltered, protected) | |
| closely adhering | |
| financially sound | |
| firmly fixed | |
| impregnable virtue | |
| in safe hands(adjective, idiom, snug, intact) | |
| made firm | |
| moving rapidly | |
| safe as houses(adjective, idiom, safe, sheltered) | |
| solid as a rock(adjective, idiom, safe, sheltered) |
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| APA | Smart Define. (2015). impregnable thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/impregnable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "impregnable thesaurus" https://smartdefine.org/impregnable/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, impregnable thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/impregnable/thesaurus/synonyms>. |
| MLA | Smart Define. "impregnable thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/impregnable/thesaurus/synonyms> |