| rampart | |
| repression | |
| reserve(calm, quiet, speech, silence, softness) | |
| reticence(calm, quiet, speech, silence, softness) | |
| revisionism | |
| roadblock | |
| rock-fill dam | |
| saturninity(calm, quiet, speech, silence, softness) | |
| sea wall | |
| seal of secrecy(expression, idiom) | |
| seawall | |
| secrecy(calm, quiet, speech, silence, softness) | |
| security | |
| shutter dam | |
| silence(noun, calm, quiet, speech, absence) | |
| sleep(calm, quiet, speech, silence, softness) | |
| smothering | |
| speech(calm, quiet, reticence) | |
| speechlessness(calm, quiet, speech, silence, softness) | |
| stifling |
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| APA | Smart Define. (2015). iron curtain thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/iron_curtain/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "iron curtain thesaurus" https://smartdefine.org/iron_curtain/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2015, iron curtain thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/iron_curtain/thesaurus/synonyms>. |
| MLA | Smart Define. "iron curtain thesaurus" 14 April 2015. Web. 30 September 2026. <https://smartdefine.org/iron_curtain/thesaurus/synonyms> |