the world > physical sensation > sleeping and waking > sleep > [noun] > an instance or period of > other specific instances
sopor1675
nightmare sleep1829
skipper1935
snore-off1950
1829 T. Carlyle in Edinb. Rev. June 457 Over our noblest faculties is spreading a nightmare sleep.
1988 R. ConquestNew & Coll. Poems 108 The waters curve before our eyes The blue brightness of a knife, A seed in a nightmare sleep To organise The individual life.