1. proprietary protected by trademark or patent or copyright
  2. proprietor someone who owns a business
  3. propaganda information that is spread to promote some cause
  4. proprietorship an unincorporated business owned by a single person who is responsible for its liabilities and entitled to its profits
  5. propagator someone who spreads the news
  6. propanediol a sweet colorless, viscous, hygroscopic liquid used as an antifreeze and in brake fluid and also as a humectant in cosmetics and personal care items although it can be absorbed through the skin with harmful effects
  7. propitiatory intended to reconcile or appease
  8. propaedeutic preceding and preparing for something
  9. preponderance exceeding in heaviness; having greater weight
  10. propensity a natural inclination
  11. rampant arch an arch whose support is higher on one side than on the other
  12. preponderate weigh more heavily
  13. European white birch European birch with silvery white peeling bark and markedly drooping branches
  14. prebendary a canon who receives a prebend for serving the church
  15. proponent a person who argues for a cause or puts forward an idea
  16. propenonitrile a colorless liquid unsaturated nitrile made from propene
  17. preponderating having superior power or influence
  18. propenoate a salt or ester of propenoic acid
  19. precentorship the position of precentor
  20. propound put forward, as of an idea