The List
There are 146 5 letter words with P as the last letter. The highest scoring is UNZIP at 16 points in Scrabble. 4 carry three or more vowels, which makes them useful for dumping a vowel-clogged rack.
ABAMPAHEAPALAAPAPOOPATRIPATTAPAYELPBEBOPBECAPBICEPBLEEPBLIMPBLOOPCARAPCHAMPCHEAPCHEEPCHELPCHIMPCHIRPCHOMPCHUMPCLAMPCLASPCLEEPCLOMPCLOOPCLUMPCRAMPCREEPCRIMPCRISPCROUPCRUMPCUTUPDROOPEQUIPESTOPFLIMPFLUMPFRUMPGALOPGENIPGETUPGLOOPGRAIPGRAMPGRASPGROUPGRUMPGUIMPHANAPJALAPJALOPJULEPKELEPKNOSPKREEPLAYUPLETUPMIXUPNETOPORLOPOXLIPPINUPPLUMPPOLYPPOULPPREOPPRIMPPSYOPREBOPRECAPREDIPREMAPSALEPSALOPSCALPSCAMPSCARPSCAUPSCOOPSCOUPSCOWPSCRAPSCRIPSCULPSETUPSHARPSHEEPSHLEPSHTUPSIRUPSITUPSKELPSKIMPSLEEPSLOOPSLUMPSLURPSNEAPSNOEPSNOOPSTAMPSTEEPSTIRPSTOEPSTOMPSTOOPSTOUPSTOWPSTRAPSTREPSTRIPSTROPSTUMPSUNUPSWAMPSWEEPSWOOPSYRUPSYSOPTHESPTHORPTHRIPTHUMPTITUPTRAMPTROMPTROOPTRUMPTULIPTWERPTWIRPUNCAPUNHIPUNRIPUNZIPUSURPWATAPWHAUPWHEEPWHELPWHOMPWHOOPWHUMP