1. puzzle over try to solve
  2. pass receiver a football player who catches a forward pass
  3. persevere be persistent, refuse to stop
  4. pullover a sweater that is put on by pulling it over the head
  5. puzzler a particularly baffling problem
  6. philosopher a specialist in the investigation of existence and knowledge
  7. Pistacia vera small tree of southern Europe and Asia Minor bearing small hard-shelled nuts
  8. sleepover an occasion of spending a night away from home or having a guest spend the night in your home (especially as a party for children)
  9. pass over travel across or pass over
  10. glaze over become glassy; lose clear vision
  11. Passover (Judaism) a Jewish festival (traditionally 8 days from Nissan 15) celebrating the exodus of the Israelites from Egypt
  12. plover any of numerous chiefly shorebirds of relatively compact build having straight bills and large pointed wings; closely related to the sandpipers
  13. perceiver a person who becomes aware through the senses
  14. gloss over treat hurriedly or avoid dealing with properly
  15. sleep over stay overnight
  16. sleek over cover up a misdemeanor, fault, or error
  17. glass over become glassy or take on a glass-like appearance
  18. slur over treat hurriedly or avoid dealing with properly
  19. muzzle loader an obsolete firearm that was loaded through the muzzle
  20. slipover a sweater that is put on by pulling it over the head