some words include:
pabulums
pachadom
pachalic
pachinko
pachisis
pachouli
pachucos
pacified
pacifier
pacifies
pacifism
pacifist
packable
a full list of words beginning with P containing 8 letters can be found here (see related links), although this list doesn't include every 8 letter word containing the letter P.
lollipop
Some eight letter words that start with B and end with P are:backdropbackstopbookshopbullwhip
poignant
township
township
Clippers (LA)
g for greeting p for pleasing
township
pancakes pancetta
An eight letter word is pretends.
Landlord is an eight letter word for innkeeper.
Eight letter word is "response"