Lethargic
Soporific
Soporific adjective - Tending to cause sleep.
Mutual synonyms
Related pairs
Cite this Source
Soporific and Lethargic. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/lethargic/soporific
Lethargic & Soporific. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/lethargic/soporific>.
Soporific or Lethargic. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/lethargic/soporific.
Google Ngram Viewer shows how "lethargic" and "soporific" have occurred on timeline