Sound
Sound adjective - (of sleep) deep and complete.
Usage example: a sound sleeper
Cite this Source
Wakeless and Sound. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/sound/wakeless
Sound & Wakeless. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/sound/wakeless>.
Wakeless or Sound. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/sound/wakeless.
Google Ngram Viewer shows how "sound" and "wakeless" have occurred on timeline