Covert
Unknown
Unknown adjective - Happening or existing without one's knowledge.
Covert and unknown are semantically related in concealed or secret topic. Sometimes you can use "Covert" instead an adjective "Unknown".
Nearby Words: unknowable, unknowing
Mutual synonyms
Both words in one sentence
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There was the R.C.X., the Weird Happenings Organization, the Department of Unknown and Covert Knowledge (don't... uh, don't think too hard about that one.), S.T.R.I.K.E.
Source: Comic Book / Excalibur -
The Peeping Tom: The summing-up montage at the end features an attempt at a covert shot of Annie exiting the ladies room taken by an unknown member of Abed's documentary team.
- Snake vows to move to Alaska and never do covert ops again, even if it involves his previously unknown twin brother.
Cite this Source
Unknown and Covert. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/covert/unknown
Covert & Unknown. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/covert/unknown>.
Unknown or Covert. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/covert/unknown.
Google Ngram Viewer shows how "covert" and "unknown" have occurred on timeline