Dead
Dead adjective - No longer living.
Fast asleep and dead are semantically related. In some cases you can replace phrase "Fast asleep" with "Dead", this terms are similar.
Nearby Word: deadly
Fast asleep
Fast asleep adjective - Sleeping deeply.
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Synonyms for Fast asleep
Dead and fast asleep are semantically related. Sometimes you can replace term "Dead" with "Fast asleep", this terms are similar.
Cite this Source
Fast asleep and Dead. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/dead/fast_asleep
Dead & Fast asleep. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/dead/fast_asleep>.
Fast asleep or Dead. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/dead/fast_asleep.
Google Ngram Viewer shows how "dead" and "fast asleep" have occurred on timeline