1. flat arch an arch with mutually supporting voussoirs that has a straight horizontal extrados and intrados
  2. flatwork ironing that can be done mechanically
  3. flatware silverware eating utensils
  4. Plutarch Greek biographer who wrote Parallel Lives (46?-120 AD)
  5. flatcar freight car without permanent sides or roof
  6. flatter praise somewhat dishonestly
  7. flattery excessive or insincere praise
  8. flattering showing or representing to advantage
  9. flatterer a person who uses flattery
  10. flatiron an iron that was heated by placing it on a stove
  11. flatworm parasitic or free-living worms having a flattened body
  12. flat wash ironing that can be done mechanically
  13. flatfish any of several families of fishes having flattened bodies that swim along the sea floor on one side of the body with both eyes on the upper side
  14. fallen arch an instep flattened so the entire sole rests on the ground
  15. flutter flap the wings rapidly or fly with flapping movements
  16. plate rack a rack for holding plates to dry after they have been washed
  17. lethargic deficient in alertness or activity
  18. oligarchy a political system governed by a few people
  19. fluttering the motion made by flapping up and down
  20. field work an investigation carried out in the field rather than in a laboratory or headquarters