Not open
Secret
Secret adjective - Undertaken or done so as to escape being observed or known by others.
Mutual synonyms
Both terms in one sentence
- He literally did nothing not secret, not open except participate in memorial ceremonies.
Source: Covert Group with Mundane Front -
Revolution X has this, in which Helga writes a bunch of "do nots" on a chalkboard, these include stuff like, "Do not open secret areas", "Do not collect powerups", etc.
Source: Can't You Read the Sign?
Cite this Source
Secret and Not open. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/not_open/secret
Not open & Secret. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/not_open/secret>.
Secret or Not open. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/not_open/secret.
Google Ngram Viewer shows how "not open" and "secret" have occurred on timeline