The List
There are 863 7 letter words with U as the first letter. The highest scoring is UNCRAZY at 21 points in Scrabble, though Words With Friends prefers UPCHUCK at 25. 592 carry three or more vowels, which makes them useful for dumping a vowel-clogged rack.
UAKARISUBEROUSUBUNTUSUDALLERUDDEREDUFOLOGYUGLIESTUGLYINGUILLEANUJAMAASUKELELEUKULELEULCEREDULEXITEULICONSULIKONSULLAGEDULLAGESULLINGSULNARIAULPANIMULSTERSULTIMASULTIONSULULANTULULATEUMBELEDUMBEREDUMBONALUMBONESUMBONICUMBRAGEUMBRELSUMBREREUMBRILSUMBROSEUMBROUSUMFAZISUMIACKSUMLAUTSUMLUNGUUMPIREDUMPIRESUMPTEENUMWELTSUMWHILEUNACTEDUNADDEDUNADEPTUNADULTUNAGILEUNAGINGUNAIDEDUNAIMEDUNAIREDUNAKINGUNAKITEUNALIKEUNALISTUNALIVEUNAPTLYUNARMEDUNASKEDUNAWAKEUNAWAREUNBAKEDUNBALEDUNBALESUNBAREDUNBARESUNBARKSUNBASEDUNBATEDUNBEARSUNBEGETUNBEGOTUNBEGUNUNBEINGUNBELTSUNBENDSUNBINDSUNBITTSUNBLENTUNBLESSUNBLESTUNBLINDUNBLOCKUNBLOWNUNBOLTSUNBONEDUNBONESUNBOOTSUNBORNEUNBOSOMUNBOUNDUNBOWEDUNBOXEDUNBOXESUNBRACEUNBRAIDUNBRAKEUNBROKEUNBUILDUNBUILTUNBULKYUNBURNTUNCAGEDUNCAGESUNCAKEDUNCAKESUNCANNYUNCAPEDUNCAPESUNCAREDUNCARTSUNCASEDUNCASESUNCEDEDUNCHAINUNCHAIRUNCHARMUNCHARYUNCHECKUNCHILDUNCHOKEUNCIALSUNCINALUNCINUSUNCITEDUNCIVILUNCLAMPUNCLASPUNCLEANUNCLEARUNCLEFTUNCLEWSUNCLINGUNCLIPSUNCLIPTUNCLOAKUNCLOGSUNCLOSEUNCLOUDUNCOCKSUNCODEDUNCOESTUNCOILSUNCOLTSUNCOMFYUNCOMICUNCOPEDUNCOPESUNCORDSUNCORKSUNCOUTHUNCOVERUNCOWLSUNCRATEUNCRAZYUNCROSSUNCROWNUNCTIONUNCUFFSUNCURBSUNCUREDUNCURLSUNCURSEUNDATEDUNDEAFSUNDEALTUNDECKSUNDEIFYUNDERDOUNDERGOUNDERNSUNDIGHTUNDINESUNDOCKSUNDOERSUNDOINGUNDRAPEUNDRAWNUNDRAWSUNDRESTUNDRIEDUNDRUNKUNDULARUNDYINGUNEAGERUNEAREDUNEARTHUNEASESUNEATENUNEDGEDUNEDGESUNENDEDUNEQUALUNFACTSUNFADEDUNFAIRSUNFAITHUNFAKEDUNFAMEDUNFANCYUNFAZEDUNFENCEUNFEUEDUNFILDEUNFILEDUNFIREDUNFITLYUNFIXEDUNFIXESUNFLESHUNFLUSHUNFOLDSUNFOOLSUNFORMSUNFOUNDUNFREEDUNFREESUNFROCKUNFROZEUNFUMEDUNFUNNYUNFURLSUNFUSEDUNFUSSYUNGATEDUNGAZEDUNGEARSUNGILDSUNGIRDSUNGIRTHUNGLOVEUNGLUEDUNGLUESUNGODLYUNGOREDUNGOWNSUNGREENUNGROWNUNGUARDUNGUENTUNGULAEUNGULARUNGULEDUNGYVEDUNGYVESUNHABLEUNHAIRSUNHANDSUNHANDYUNHANGSUNHAPPYUNHARDYUNHASPSUNHASTYUNHEADSUNHEALSUNHEARDUNHEARTUNHEEDYUNHELEDUNHELESUNHELMSUNHERSTUNHINGEUNHIREDUNHITCHUNHIVEDUNHIVESUNHOARDUNHOODSUNHOOKSUNHOOPSUNHOPEDUNHORSEUNHOUSEUNHUMANUNHUSKSUNIBODYUNIBROWUNICITYUNICORNUNIDEALUNIFACEUNIFIEDUNIFIERUNIFIESUNIFORMUNIPEDSUNIPODSUNIQUERUNIQUESUNISIZEUNISONSUNITAGEUNITARDUNITARYUNITERSUNITIESUNITINGUNITIONUNITISEUNITIVEUNITIZEUNJADEDUNJOINTUNKEMPTUNKINGSUNKINKSUNKNITSUNKNOTSUNKNOWNUNLACEDUNLACESUNLADEDUNLADENUNLADESUNLASTEUNLATCHUNLAWEDUNLEADSUNLEARNUNLEASHUNLEVELUNLIKEDUNLIKESUNLIMEDUNLIMESUNLINEDUNLINESUNLINKSUNLIVEDUNLIVESUNLOADSUNLOBEDUNLOCKSUNLOOSEUNLORDSUNLOVEDUNLOVESUNLUCKYUNMACHOUNMAKERUNMAKESUNMANLYUNMARRYUNMASKSUNMATEDUNMEANTUNMERRYUNMETEDUNMEWEDUNMINEDUNMITERUNMITREUNMIXEDUNMIXESUNMOLDSUNMOORSUNMORALUNMOULDUNMOUNTUNMOVEDUNNAILSUNNAMEDUNNEATHUNNERVEUNNESTSUNNOBLEUNNOISYUNNOTEDUNOAKEDUNOFTENUNOILEDUNORDERUNOWNEDUNPACEDUNPACKSUNPAGEDUNPAINTUNPANELUNPAPERUNPAREDUNPAVEDUNPERCHUNPICKSUNPILEDUNPILESUNPINKTUNPLACEUNPLAITUNPLUGSUNPLUMBUNPLUMEUNPOPEDUNPOPESUNPOSEDUNPRAYSUNPROPSUNPURSEUNQUEENUNQUIETUNQUOTEUNRACEDUNRAKEDUNRAKESUNRATEDUNRAVELUNRAZEDUNREADYUNREAVEUNREELSUNREEVEUNREINSUNRESTSUNRIGHTUNRIMEDUNRIPERUNRISENUNRIVENUNRIVETUNROBEDUNROBESUNROLLSUNROOFSUNROOSTUNROOTSUNROPEDUNROPESUNROUGHUNROUNDUNROVENUNROYALUNRUFFEUNRULEDUNRULESUNSAFERUNSAINTUNSATEDUNSAVEDUNSAWEDUNSCALEUNSCARYUNSCREWUNSEALSUNSEAMSUNSEATSUNSEELSUNSEENSUNSELFSUNSELLSUNSENSEUNSEWEDUNSEXEDUNSEXESUNSHALEUNSHAPEUNSHARPUNSHELLUNSHENTUNSHEWNUNSHIFTUNSHIPSUNSHOEDUNSHOESUNSHOOTUNSHORNUNSHOUTUNSHOWNUNSHOWYUNSHUTSUNSIGHTUNSINEWUNSIZEDUNSLAINUNSLICKUNSLINGUNSLUNGUNSMARTUNSMOTEUNSNAGSUNSNAPSUNSNARLUNSNECKUNSOBERUNSOLIDUNSONCYUNSONSYUNSOOTEUNSOULSUNSOUNDUNSOWEDUNSPARSUNSPEAKUNSPELLUNSPENTUNSPIDEUNSPIEDUNSPILTUNSPLITUNSPOKEUNSPOOLUNSTACKUNSTAIDUNSTATEUNSTEELUNSTEPSUNSTICKUNSTOCKUNSTOPSUNSTOWSUNSTRAPUNSTRIPUNSTUCKUNSTUFTUNSTUNGUNSUITSUNSUNNYUNSUREDUNSURERUNSWEARUNSWEETUNSWEPTUNSWOREUNSWORNUNTACKSUNTAKENUNTAMEDUNTAMESUNTAXEDUNTAXESUNTEACHUNTEAMSUNTENTSUNTENTYUNTHAWSUNTHINKUNTILEDUNTILESUNTIMEDUNTIREDUNTOMBSUNTONEDUNTRACEUNTRACKUNTREADUNTRIDEUNTRIEDUNTRIMSUNTRUERUNTRULYUNTRUSSUNTRUSTUNTRUTHUNTUCKSUNTUNEDUNTUNESUNTURFSUNTURNSUNTWINEUNTWISTUNTYINGUNURGEDUNUSUALUNVAILEUNVAILSUNVEILSUNVEXEDUNVISORUNVITALUNVOCALUNVOICEUNWAGEDUNWAKEDUNWARESUNWARIEUNWATERUNWAXEDUNWAYEDUNWEALSUNWEARYUNWEAVEUNWELDYUNWHIPTUNWHITEUNWILLSUNWINDSUNWIPEDUNWIREDUNWIRESUNWISERUNWITCHUNWITTYUNWIVEDUNWIVESUNWOMANUNWOOEDUNWORKSUNWORTHUNWOUNDUNWOVENUNWRAPSUNWRITEUNWROTEUNWRUNGUNYOKEDUNYOKESUNYOUNGUNZONEDUPBEARSUPBEATSUPBINDSUPBLOWNUPBLOWSUPBOILSUPBORNEUPBOUNDUPBRAIDUPBRASTUPBRAYSUPBREAKUPBRINGUPBROKEUPBUILDUPBUILTUPBURSTUPCASTSUPCATCHUPCHEERUPCHUCKUPCLIMBUPCLOSEUPCOASTUPCOILSUPCOMESUPCOURTUPCURLSUPCURVEUPDARTSUPDATEDUPDATERUPDATESUPDIVEDUPDIVESUPDRAFTUPDRAGSUPDRAWNUPDRAWSUPDRIEDUPDRIESUPENDEDUPFIELDUPFILLSUPFLINGUPFLOWSUPFLUNGUPFOLDSUPFRONTUPFURLSUPGANGSUPGAZEDUPGAZESUPGIRDSUPGOINGUPGRADEUPGROWNUPGROWSUPHANGSUPHAUDSUPHEAPSUPHEAVEUPHILLSUPHOARDUPHOISTUPHOLDSUPHOORDUPHROESUPHURLSUPKEEPSUPKNITSUPLANDSUPLEADSUPLEANSUPLEANTUPLEAPSUPLEAPTUPLIFTSUPLIGHTUPLINKSUPLOADSUPLOCKSUPLOOKSUPLYINGUPMAKERUPMAKESUPPILEDUPPILESUPPINGSUPPROPSUPRAISEUPRATEDUPRATESUPREACHUPREARSUPRESTSUPRIGHTUPRISALUPRISENUPRISERUPRISESUPRISTSUPRIVERUPROARSUPROLLSUPROOTSUPROUSEUPSCALEUPSELLSUPSENDSUPSHIFTUPSHOOTUPSHOTSUPSIDESUPSILONUPSIZEDUPSIZESUPSKILLUPSLOPEUPSOARSUPSPAKEUPSPEAKUPSPEARUPSPOKEUPSTAGEUPSTAIRUPSTANDUPSTAREUPSTARTUPSTATEUPSTAYSUPSTEPSUPSTIRSUPSTOODUPSURGEUPSWAYSUPSWEEPUPSWELLUPSWEPTUPSWINGUPSWUNGUPTAKENUPTAKESUPTALKSUPTEARSUPTEMPOUPTHREWUPTHROWUPTICKSUPTIGHTUPTILTSUPTIMESUPTOWNSUPTRAINUPTRENDUPTURNSUPTYINGUPVALUEUPWAFTSUPWARDSUPWELLSUPWHIRLUPWINDSUPWOUNDUPWRAPSURACHUSURACILSURAEMIAURAEMICURALITEURANIANURANIASURANIDEURANINSURANISMURANITEURANIUMURANOUSURANYLSURBANERURCEOLIURCHINSUREASESUREDIALUREDINEUREDIUMUREIDESUREMIASURETERSURETHANURETHRAURGENCEURGENCYURGINGSURICASEURIDINEURINALSURINANTURINARYURINATEURININGURINOSEURINOUSURNFULSURNINGSURNLIKEURODELEUROLITHUROLOGYUROMEREUROPODSUROSOMEURTEXTSURTICASUSAGERSUSANCESUSAUNCEUSEABLEUSEABLYUSEFULSUSELESSUSHEREDUSTIONSUSUALLYUSUCAPTUSURERSUSURESSUSURIESUSURINGUSUROUSUSURPEDUSURPERUSWARDSUTENSILUTERINEUTILISEUTILITYUTILIZEUTMOSTSUTOPIANUTOPIASUTOPISMUTOPISTUTRICLEUTTEREDUTTERERUTTERLYUVEITICUVEITISUVULARSUXORIAL