The List
There are 336 4 letter words with P as the first letter. The highest scoring is POZZ at 24 points in Scrabble. 3 of them contain no vowel at all: PFFT, PRYS, PSST.
PAALPAANPACAPACEPACKPACOPACSPACTPACYPADIPADSPAGEPAHSPAIDPAIKPAILPAINPAIRPAISPALEPALLPALMPALPPALSPALYPAMSPANDPANEPANGPANSPANTPAPAPAPEPAPSPARAPARDPAREPARKPARPPARRPARSPARTPASEPASHPASSPASTPATEPATHPATSPATUPATYPAUAPAULPAVEPAVSPAWAPAWKPAWLPAWSPAYSPEAGPEAKPEALPEANPEARPEASPEATPEBAPECHPECKPECSPEDSPEEDPEEKPEELPEENPEEPPEERPEESPEGHPEGSPEHSPEINPEKEPELAPELEPELFPELLPELSPELTPENDPENEPENIPENKPENSPENTPEONPEPOPEPSPEREPERIPERKPERMPERNPERPPERTPERVPESOPESTPETSPEWSPFFTPFUIPHATPHEWPHISPHIZPHOHPHONPHOSPHOTPHUTPIALPIANPIASPICAPICEPICKPICSPIEDPIERPIESPIETPIGSPIKAPIKEPIKIPILAPILEPILIPILLPILYPIMAPIMPPINAPINEPINGPINKPINSPINTPINYPIONPIOYPIPAPIPEPIPIPIPSPIPYPIRLPIRNPIRSPISEPISHPISOPITAPITHPITSPITYPIUMPIXYPIZEPLANPLAPPLATPLAYPLEAPLEBPLEDPLEWPLEXPLIEPLIMPLODPLOPPLOTPLOWPLOYPLUEPLUGPLUMPLUSPOASPOCKPOCOPODSPOEMPOEPPOETPOGOPOGYPOISPOKEPOKYPOLEPOLKPOLLPOLOPOLSPOLTPOLYPOMEPOMOPOMPPOMSPONDPONEPONGPONKPONSPONTPONYPOOHPOOKPOOLPOORPOOSPOOTPOPEPOPSPOREPORKPORTPORYPOSEPOSHPOSSPOSTPOSYPOTEPOTSPOTTPOUFPOUKPOURPOUTPOWNPOWSPOXYPOZZPRADPRAMPRAOPRATPRAUPRAYPREEPREMPREPPREXPREYPREZPRIGPRIMPROAPROBPRODPROFPROGPROMPROOPROPPROSPROWPRUHPRYSPSISPSSTPTUIPUBSPUCEPUCKPUDSPUDUPUERPUFFPUGHPUGSPUHAPUIRPUJAPUKAPUKEPUKUPUKYPULAPULEPULIPULKPULLPULPPULSPULUPULYPUMAPUMPPUMYPUNAPUNGPUNKPUNSPUNTPUNYPUPAPUPSPUPUPUREPURIPURLPURRPURSPUSHPUSSPUTSPUTTPUTZPUYSPYASPYATPYESPYETPYICPYINPYNEPYOTPYREPYRO