Another word for faultless that starts with the letter "p" is "pristine." This term conveys a sense of being unspoiled, perfect, or in its original condition, often used to describe something that is flawless or without any defects.
perfect or pure
pester
Position.
plagiarize
Professional
Pail.
Another name is pant.
Particle
pressed
Plundering
pestering
penitence