Silent
Secret
Secret adjective - Not known or meant to be known by the general populace.
Usage example: proprietary information that the company does its best to keep secret
Silent and secret are semantically related in uncommunicative topic. Sometimes you can use "Silent" instead an adjective "Secret", if it concerns topics such as secretive.
Cite this Source
Secret and Silent. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/silent/secret
Silent & Secret. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/silent/secret>.
Secret or Silent. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/silent/secret.
Google Ngram Viewer shows how "silent" and "secret" have occurred on timeline