Buttoned up
Top secret and buttoned up are semantically related. in kept secret topic. In some cases you can use "Top secret" instead an adjective "Buttoned up".
Top secret
Buttoned up and top secret are semantically related. Sometimes you can use "Buttoned up" instead an adjective phrase "Top secret".
Cite this Source
Top secret and Buttoned up. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/buttoned_up/top_secret
Buttoned up & Top secret. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/buttoned_up/top_secret>.
Top secret or Buttoned up. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/buttoned_up/top_secret.
Google Ngram Viewer shows how "buttoned up" and "top secret" have occurred on timeline