1. flat cap a flat woolen cap with a stiff peak
  2. flatcar freight car without permanent sides or roof
  3. flat coat the first or preliminary coat of paint or size applied to a surface
  4. fly the coop flee; take to one's heels; cut and run
  5. flat-top having a flat or flattened upper surface
  6. flattop a closely cropped haircut; usually for men
  7. flytrap a trap for catching flies
  8. cloth cap a flat woolen cap with a stiff peak
  9. foolscap a size of paper used especially in Britain
  10. flat pea European perennial with mottled flowers of purple and pink
  11. fool's cap a cone-shaped paper hat formerly placed on the head of slow or lazy pupils
  12. FLETC a center in the Department of that trains law enforcement professionals for more than seventy federal agencies
  13. flatboat a flatbottom boat for carrying heavy loads
  14. flathead food fish of the Indonesian region of the Pacific
  15. blackcap chickadee having a dark crown
  16. flat-hat fly very close to the ground
  17. volatile liable to lead to sudden change or violence
  18. voltaic pile battery consisting of voltaic cells arranged in series
  19. floodgate a valve that controls the flow of water
  20. flashback a transition in a story to an earlier event or scene