penury
extreme poverty
peregrination
a wandering from place to place
peremptory
imperative; leaving no choice
perennial
present throughout the years; persistent
perfidious
faithless; disloyal; untrustworthy
perfunctory
superficial; not thorough; performed really as a duty
perigee
point in an orbit that is closest to the earth
permeable
penetrable
perturb
to disturb greatly; make uneasy or anxious; cause a body to deviate from its regular orbit
pervasive
spread throughout every part