Close
Close adjective - Having little space between items or parts.
Top secret and close are semantically related. In some cases you can use "Top secret" instead an adjective "Close".
Top secret
Close and top secret are semantically related. You can use "Close" instead an adjective phrase "Top secret".
Cite this Source
Top secret and Close. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/close/top_secret
Close & Top secret. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/close/top_secret>.
Top secret or Close. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/close/top_secret.
Google Ngram Viewer shows how "close" and "top secret" have occurred on timeline