Asleep
Asleep adjective - Being in a state of suspended consciousness.
Unknown
Unknown adjective - Happening or existing without one's knowledge.
Asleep and unknown are semantically related. Sometimes you can use "Asleep" instead an adjective "Unknown".
Nearby Words: unknowable, unknowing
Both words in one sentence
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Hence why she tends to be paranoid about falling asleep in an unknown area, lest there be a corpse around and she raises it without realizing, and then it's trapped that way.
Source: I See Dead People -
An unknown catalyst entered the mixture while the scientist overseeing it was asleep.
Source: Comic Book / Captain America -
Who shot her is unknown (it is unlikely that Amos Slade shot her because at that time he is buying Copper and his original hunting dog Chief was asleep in his introduction).
Source: Disney / The Fox and the Hound
Cite this Source
Unknown and Asleep. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/asleep/unknown
Asleep & Unknown. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/asleep/unknown>.
Unknown or Asleep. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/asleep/unknown.
Google Ngram Viewer shows how "asleep" and "unknown" have occurred on timeline