Iron curtain
Iron curtain noun - An impenetrable barrier to communication or information especially as imposed by rigid censorship and secrecy; used by Winston Churchill in 1946 to describe the demarcation between democratic and communist countries.
Top secret and iron curtain are semantically related. In some cases you can use "Top secret" instead a noun phrase "Iron curtain".
Top secret
Iron curtain and top secret are semantically related. Sometimes you can use "Iron curtain" instead a noun phrase "Top secret".
Mutual synonyms
Cite this Source
Top secret and Iron curtain. (2016). Retrieved 2026, July 31, from https://thesaurus.plus/related/iron_curtain/top_secret
Iron curtain & Top secret. N.p., 2016. Web. 31 Jul. 2026. <https://thesaurus.plus/related/iron_curtain/top_secret>.
Top secret or Iron curtain. 2016. Accessed July 31, 2026. https://thesaurus.plus/related/iron_curtain/top_secret.
Google Ngram Viewer shows how "iron curtain" and "top secret" have occurred on timeline