1. proprietary protected by trademark or patent or copyright
  2. propaganda information that is spread to promote some cause
  3. proprietor someone who owns a business
  4. propagator someone who spreads the news
  5. promoter someone who is an active supporter and advocate
  6. prebendary a canon who receives a prebend for serving the church
  7. propitiatory intended to reconcile or appease
  8. propitious presenting favorable circumstances
  9. proper marked by suitability or rightness or appropriateness
  10. problematic making great mental demands
  11. propriety correct behavior
  12. propaedeutic preceding and preparing for something
  13. propeller device with blades that rotate to push against air or water
  14. propound put forward, as of an idea
  15. propellor a mechanical device that rotates to push against air or water
  16. propanamide the amide of propionic acid (C2H5CONH2)
  17. propositus the person immediately affected by or concerned with an action
  18. property something owned
  19. propensity a natural inclination
  20. rope-maker a craftsman who makes ropes