Thousands of words begin with the letter p. A few of those words include pathetic, pessimistic, petite, perfect, petty, philanthropic, pitiful, pleasant, plump, poised, polite, pompous, powerful, pragmatic, precious, pretentious, pretty, private, productive, professional, proud, psychotic, purposeful and pushy.
appleapplyappreciateapproachappraiseappellateapplaudclappedcuppedclippedchippedcappeddappledippeddroppeddrippedflappperflippableflipperflippedfloppedgrippedgloppedguppygrapplehappyhippiehoppedpuppypeppypreppypepperpoppypoppedripplerapportsuppersupportsupplyslappedsnappedsnappystrippedshippedslippedsloppedsteppedtoppertippedtrappedwhopperwhipped
No words were found in the English dictionary. The name Exxon has a double x. Exxon is a brand of petroleum based products manufacturered by the ExxonMobil company.
Not English words, that I know of. Powwow is one, also a variety of worms glowworm, arrowworm, screwworm and slowworm.
une enveloppe (with a double 'p')
Some words that have UU in them are:continuummuumuuresiduumvacuum
appleapplyappreciateapproachappraiseappellateapplaudclappedcuppedclippedchippedcappeddappledippeddroppeddrippedflappperflippableflipperflippedfloppedgrippedgloppedguppygrapplehappyhippiehoppedpuppypeppypreppypepperpoppypoppedripplerapportsuppersupportsupplyslappedsnappedsnappystrippedshippedslippedsloppedsteppedtoppertippedtrappedwhopperwhipped
Words with double t's:atticattachattainattireattitudebatterybettingbrittlebarrettebuttressbetterbitterbottlebutterbuttonblottercattlecassettecommitteecluttercottoncuttingdittodiskettedinetteetiquetteflutterfritterfatterfetteredfittedglittergutterhitterhotterjitterykettleknittedknottedlittlelotterylettermattermattednettedotterpatternpattypattedpottingpotteryputterpettedrattlesettlestutterspattersputterspittingsplittingspottedswattedslottedscattertattleutterlyvettedwittedkittenlitterbatteredpatternsbetterbottompermitted
pinapple
aardvark
appleapplyappreciateapproachappraiseappellateapplaudclappedcuppedclippedchippedcappeddappledippeddroppeddrippedflippableflippedfloppedgrippedgloppedguppygrapplehappyhippiehoppedpuppypeppypepperpoppypoppedripplerapportsupperslappedsnappedsnappystrippedshippedslippedsloppedtoppertippedtrappedwhopperwhippedappealapplication, applyapproveappreciateapproachappointappallappallingapparatusapparelapparentappearappendixapprehendappetizerapplaudapplauseapplianceapplicableapproximateapprenticeapprehensionapprovalappendageappendicitisappeaseappointeeapplicatorapproximationclipperclappingclippingchoppingchippingdapperdroppeddrippeddrippingdipperflapperflipperguppygrippinghippiehappylappedmappedmappingmoppednappingnippernappynippednippleoppressopponentopposeoppressiveoppositesupportsappysnappysupposeslippershoppershoppingshoppedstoppedslipperypepperpoppypuppetpuppypeppyripplesippedslippedslappingsteppingtippertrippedtrappedtopplewhippedsapphireappeardisappearappointdisappointapplyapplicationreapplyhippopotamushippocrashippogriffhippogryph
ammoniaammunitionbrimmingbummerchummeddimmerdrummerflammablegrimmergrommetglimmergrammarhammerhummerimmerseimmurejammedmammalpummelrimmedshimmersummerslammerskimmerslimmersimmerswimmerswimmingtrimmer
sayyid
buzzbuzzarddazzledrizzledizzyfizzfuzzfuzzyfizzlefrazzledguzzlegizzardgrizzlyjazzmuzzlenozzlenuzzlepuzzlepizzarazzsizzlewhizzed
Exxon
capuccino
Sayyid
No.