Known
Known adjective - Apprehended with certainty.
Usage example: a known criminal
Unknown
Both words in one sentence
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Karma Houdini: The known or unknown criminals who have gotten away with their crimes.
Source: Series / Unsolved Mysteries - No genre was off-limits (or medium, for that matter; several animated films were written up), and no movie was too well-known or unknown.
Source: Roger Ebert Great Movies List - It's not like many viewers know that much about Urban Legends anyway but Supernatural has devoted itself to doing every single Legend that it can cram in, no matter how known or unknown it is.
Cite this Source
Unknown and Known. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/known/unknown
Known & Unknown. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/known/unknown>.
Unknown or Known. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/known/unknown.
Google Ngram Viewer shows how "known" and "unknown" have occurred on timeline