Without sleep
Wakeful and without sleep are semantically related In some cases you can use "Wakeful" instead an adjective phrase "Without sleep".
Wakeful
Wakeful adjective - Not sleeping or able to sleep.
Without sleep and wakeful are semantically related in unsleeping topic. You can use "Without sleep" instead an adjective "Wakeful".
Mutual synonyms
Cite this Source
Wakeful and Without sleep. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/without_sleep/wakeful
Without sleep & Wakeful. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/without_sleep/wakeful>.
Wakeful or Without sleep. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/without_sleep/wakeful.
Google Ngram Viewer shows how "without sleep" and "wakeful" have occurred on timeline