1. pecuniary : pertaining to money
2. pedantic :showing off learning; bookish
3. pell-mell : in confusion; disorderly
4. pellucid : transparent; limpid; easy to understand
5. pendant : hanging down from something
6. pendent : suspended; jutting; pending
7. penitent : repentant
8. pensive : dreamily thoughtful; thoughtful with a hint of sadness
9. penurious : stingy; parsimonious
10. peremptory : demanding and leaving no choice
11. perennial : lasting
12. perfidious : basely false
13. perforce : of necessity
14. perfunctory : superficial; listless; not thorough
15. peripatetic : walking about; moving
16. permeable : porous; allowing passage through
17. pernicious : very destructive
18. perpetual : everlasting
19. perspicacious : having insight; penetrating; astute
20. pert : impertinent; forward
21. pertinacious : stubborn; persistent
22. pertinent : suitable; to the point
23. perverse : stubborn; intractable
24. pervious : penetrable
25. pestilential : causing plague; baneful