Auburn, august, autumn, buyout, cupful, dugout, future, luxury, museum, mutual, outrun, pursue, quorum, suburb, tumult, uncurl, unglue, unjust, unruly, unsure, untrue, upturn, unused, unduly, unique, useful and unplug are 6 letter words. They contain the letter u twice.
Humbug
vacuum
A six letter word that starts with U is upward.
Some six letter words with U as the fourth letter:AbductAbruptAbsurdAccuseActualAgoutiAlludeAllureAmountAmbushAnnualAroundArouseAssumeAssureAstuteAttuneDeduceDeductEndureEnoughEnsureInjureLegumeManualNatureOccultOccupyRefuseReputeResultResumeRobustSaluteSequelSequinSloughSpouseSpruceTenureTraumaSome six letter words with U as the fifth letter:AbacusAccrueAsylumAtriumAvenueCactusCherubChorusCircusCitrusConcurDetourFamousFungusHiatusLeagueLineupMasqueMediumMiscueMurmurMuseumOpaquePeanutPlaquePursueRadiusRescueRhesusSodiumStatueStatusTalcumTeacupTongueUniqueUntrueVirtueWalnutWalrus
Some six letter words with the second letter U are:auburnaugustauricleauroraauthorautismautumnbucketbucklebudgetbuffetbufferbulletbumblebumperbundlebunglebunkerburgleburgerbutanebutlerbutterbuttoncubismcuckoocuddlecudgelcupolacurfewcurlercursorcurtsycustomcutletcutoffcutterdugoutdulcetduplexdustereulogyeunucheurekafumblefungusfunnelfurrowfusionfutilefutureguitarguiltygulletgunnergurglegussetgutterguzzlehuddlehumblehungerhunterhustlejumblejunglejunkiekuchenlumbermuddlemumblemuttermutualnudistnuggetoustedoutfitoutrunpuddlepulleypunnetpusherputterquaintqueasyrubberruggedrusticsubtlesubmitsucklesullensupplesurreytumbleturkeyturrettussleturtlevulgar
Some six letter words with second letter U and fourth letter K are:bucketbucklebunkercuckooduckedduckiehunkerhuskedjunkedjunkerjunketluckedlurkedmuckedmusketmuskoxpuckerpunkedquakesruckussuckersulkedsunkentuckedturkey
untrue
muumuu
Some six letter words that include the letter U are:absurdactualaroundauthorblouseblurryburdenburrowcampuschorusquaverstupidtruant
pumice
Usuals. Noun: The drink someone habitually orders or prefers.
Some six letter words that end in U are:bureaugateaulandaumilieumuumuu