1. Involving four parties
   - four-party

See also: many-sided, multilateral

• prostatic
• prostatic adenocarcinoma
• prostatitis
• prostheon
• prosthesis
• prosthetic
• prosthetic device
• prosthetics
• prosthetist
• prosthion
• prosthodontia
• prosthodontic
• prosthodontics
• prosthodontist
• Prostigmin
• prostitute
• prostitution
• prostitutor
• prostrate
• prostration
• prostyle
• prosumer
• prosy
• protactinium
• protagonism