Collapse
Collapse noun - A complete depletion of energy or strength.
Sleepiness and collapse are semantically related. In some cases you can use "Sleepiness" instead a noun "Collapse".
Sleepiness
Sleepiness noun - The quality or state of desiring or needing sleep.
Collapse and sleepiness are semantically related. Sometimes you can use "Collapse" instead a noun "Sleepiness".
Mutual synonyms
Cite this Source
Sleepiness and Collapse. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/collapse/sleepiness
Collapse & Sleepiness. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/collapse/sleepiness>.
Sleepiness or Collapse. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/collapse/sleepiness.
Google Ngram Viewer shows how "collapse" and "sleepiness" have occurred on timeline