1. fall asleep change from a waking to a sleeping state
  2. fast asleep sleeping deeply
  3. full stop a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations
  4. pillow slip bed linen consisting of a cover for a pillow
  5. fleeceable naive and easily deceived or tricked
  6. foolscap a size of paper used especially in Britain
  7. fool's cap a cone-shaped paper hat formerly placed on the head of slow or lazy pupils
  8. fellowship the state of being with someone
  9. falsely in an insincerely false manner
  10. flue stop an organ stop with the tone of a flue pipe
  11. fuel cell cell that produces electricity by oxidation of fuel
  12. false hellebore perennial herbs of the lily family having thick toxic rhizomes
  13. asleep in a state of sleep
  14. oversleep awake later than intended
  15. REM sleep a recurring sleep state during which dreaming occurs
  16. false labor painless contractions of the muscles of the uterus that continue throughout pregnancy with increasing frequency
  17. beauty sleep sleep before midnight
  18. twilight sleep a state of general anesthesia in which the person retains a slight degree of consciousness; can be induced by injection of scopolamine or morphine
  19. sleep a natural and periodic state of rest
  20. false lupine western United States bushy herb having yellow pea-like flowers