Protoactinium

Physician's assistant
(us) Abbreviation for the state of Pennsylvania, a state of the us.
(technology) (abbreviation for public-address system) Amplification setup for music or speech, usually employed in auditoriums or commercial venues.
1 Pennsylvania
2 chiefly British per annum
3 personal assistant
4 power amplifier
5 power of attorney
6 press agent
7 professional association
8 public address
9 purchasing agent

Panama

Father, short for papa