1. ferret out search and discover through persistent investigation
  2. forethought planning or plotting in advance of acting
  3. fretted having frets
  4. fortuitous lucky; occurring by happy chance
  5. fortieth the ordinal number of forty in counting order
  6. ferret a small domesticated mammal with a flexible, elongated body
  7. foredate establish something as being earlier relative to something else
  8. ferryboat a boat that transports people or vehicles across a body of water and operates on a regular schedule
  9. force out force or drive out
  10. force-out a putout of a base runner who is required to run
  11. freak out lose one's nerve
  12. fertility the state of being capable of producing offspring
  13. fervent characterized by intense emotion
  14. freeze out change from a liquid to a solid when cold
  15. sort out arrange or order by classes or categories
  16. wear out deteriorate through use or stress
  17. fitted out prepared with proper equipment
  18. ferritin a protein containing 20% iron that is found in the intestines and liver and spleen; it is one of the chief forms in which iron is stored in the body
  19. foretaste an early limited awareness of something yet to occur
  20. write out put into writing; write in complete form