1. fall back fall backwards and down
  2. fallback to break off a military action with an enemy
  3. fullback the position of a back on a football team
  4. flashback a transition in a story to an earlier event or scene
  5. call back summon to return
  6. callback a request by the manufacturer of a defective product to return the product (as for replacement or repair)
  7. call-back a return call
  8. full-page occupying an entire page in a book or paper
  9. full page something that covers an entire page
  10. fleabag a run-down hotel
  11. flash back return in time
  12. pull back pull back or move away or backward
  13. rollback reducing prices back to some earlier level
  14. pullback the act of pulling back
  15. tailback (American football) the person who plays tailback
  16. fallible wanting in moral strength, courage, or will
  17. fatback salt pork from the back of a hog carcass
  18. feedback the process in which output of a system is returned to input
  19. flapjack a flat cake of thin batter fried on both sides on a griddle
  20. feed back submit (information) again to a program or automatic system