1) Human 2) Individual 3) Mortal 4) One nodding 5) One nodding off 6) One who is nodding 7) Person 8) Somebody 9) Someone 10) Soul Found on https://www.crosswordclues.com/clue/sleepyhead
Sleep'y·head` noun 1. A sleepy person. « To bed, to bed, says Sleepyhead .» Mother Goose. 2. (Zoology) The ruddy duck. Found on http://www.encyclo.co.uk/webster/S/120