1. flat wash ironing that can be done mechanically
  2. 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
  3. flatware silverware eating utensils
  4. flat arch an arch with mutually supporting voussoirs that has a straight horizontal extrados and intrados
  5. flourish grow vigorously
  6. volatile liable to lead to sudden change or violence
  7. flash emit a brief burst of light
  8. flathead food fish of the Indonesian region of the Pacific
  9. flat-hat fly very close to the ground
  10. fly ash fine solid particles of ash that are carried into the air when fuel is combusted
  11. fattish somewhat fat
  12. flats footwear with no heel
  13. latish somewhat late
  14. flatter praise somewhat dishonestly
  15. flattery excessive or insincere praise
  16. welwitschia curious plant of arid regions of southwestern Africa having a yard-high and yard-wide trunk like a turnip with a deep taproot and two large persistent woody straplike leaves growing from the base; living relic of a flora long disappeared; some may be 700-5000 years old
  17. floatation the phenomenon of floating
  18. flawed having a blemish or flaw
  19. flush rinse, clean, or empty with a liquid
  20. flat having a surface without slope