| Slumberous 1. (a.) Inviting slumber; soporiferous. 2. (a.) Being in the repose of slumber; sleepy; drowsy. Thesaurus Entries comatose, dopey, dozy, drowsy, heavy, hebetudinous, hypnotic, narcotic, nodding, opiate, sluggish, snoozy, somnifacient, somniferous, somnolent, soporific, stupid, torpid | ![]() |