1. pigsty a pen for swine
  2. backside the side of an object that is opposite its front
  3. backseat a seat at the back of a vehicle
  4. backstay a stay that supports the back of something
  5. pick out pick out, select, or choose from a number of alternatives
  6. pick at eat like a bird
  7. bauxite a clay-like mineral
  8. picket a wooden strip forming part of a fence
  9. pack rat someone who collects things that have been discarded by others
  10. pack ice a large expanse of floating ice
  11. Pickett American Confederate general known for leading a disastrous charge at Gettysburg (1825-1875)
  12. biaxate having two axes
  13. peck at eat like a bird
  14. bequest a gift of personal property by will
  15. Paxto an Iranian language spoken in Afghanistan and Pakistan
  16. back out move out of a space backwards
  17. backstitch an overlapping stitch made by starting the next stitch at the middle of the preceding one
  18. pickled (used of foods) preserved in a pickling liquid
  19. bicuspid having two cusps or points (especially a molar tooth)
  20. backslide return to a lower level, as in one's morals or standards