smart drugˈsmart drug noun [countable] 
a drug that is intended to improve your memory and ability to think
a drug that is intended to improve your memory and ability to think- productively
- productivity
- product placement
- prof
- profane
- profanity
- profess
- professed
- profession
- professional
- professional foul
- Professional Golfers' Association of America
- professionalism
- professionalization
- professionalize
- professionally
- professional wrestler
- professional wrestling
- professor
- professorial
- professorially
- professorship
- proffer
- proficiency
- proficient