aardvark, aardwolf, bazaar. Saavy is another example. It is probably the smoothest sounding "aa" of the bunch. Ironically, i am wrong ,and it is spelled savvy.The word aargh also falls in this category. it is used to express some strong emotion.
There are no words that have double-x in them.
Words with double t's:atticattachattainattireattitudebatterybettingbrittlebarrettebuttressbetterbitterbottlebutterbuttonblottercattlecassettecommitteecluttercottoncuttingdittodiskettedinetteetiquetteflutterfritterfatterfetteredfittedglittergutterhitterhotterjitterykettleknittedknottedlittlelotterylettermattermattednettedotterpatternpattypattedpottingpotteryputterpettedrattlesettlestutterspattersputterspittingsplittingspottedswattedslottedscattertattleutterlyvettedwittedkittenlitterbatteredpatternsbetterbottompermitted
Some words with a double 'h' are:bathhousefishhookhitchhikerhighhandedroughhewnroughhouseshhwithhold
Examples of words with double consonants:abbreviationacceptallureassumeaffableaggressiveanniversaryballetbarrettebubblebabblebobblecuddlecattlecrabbychubbycoffeecellarcollarcallousdollardilldimmerellipseflattenflabbyfloppyfoggyflutterfrazzleflatterflammablegabbyhappyhasslehammerissueillinnjollylullladderletterlattermaggotmuzzleoccupyoffoddpaddlepuzzlepuddleparrotpuffquillquellrallyreallyrapportsummerslobbersaddlesettlesuddenshippedsnappedtabbytrippedtaffytoggleuddervolleyvalleywhiffwafflewrappedyellowyuccazappedzipper
Some double N words are:announceannoyannexanniversaryantennaannualbandannabannerbanningbeginningbonnetbunnycanneryconnectcannibalcanningcannoncannulacayennechannelconnoteconnoisseurcunningdinnerdisconnectevennessfanningfennelflannelfunnelfunnygrannygrinninghennainninnateinnerinningjuliennekennelmannersmanningmannishmayonnaisenannyninnynunneryopennesspanningpennantpennypinnaclepinningplanningquestionnairereconnectroadrunnerrunningrunnyscanningskinnysonnetspinningstunningsunnytanningtennistunneltyrannyuncannyunnerveunnoticedwinningwinnowzinnia
Aardvark and eel are words. They begin with double letters.
words likeflammablerummagelummoxbummergrammarimmediateimmenseimmigrantimmortalimmobileimminentimmuneimmortalimmodestimmobilerecommendcommentsummerhammertrimmerdrummerstammersimmershimmerglimmer
Words with two double Es is beekeeper (and variants), peewee, and teepee.
Some words that have double Es are:agreeamputeeapogeebansheebeebeechbeefbeenbeepbeerbeetbeetlebeseechbetweenbleedbooteebreechbreedbreezebungeecanteencareencareercheekcheepcheercheesecheetahchickadeecoffeecouleecreelcreepdecreedeeddeemdeepdeerdegreediscreetemceeengineerexceedfeefeeblefeedfeelfeetfianceefiligreefleefleecefleetfreefreezegeekgeesegenteelgleegoateegreedygreengreetheedheeljamboreejeepjeerjubileekeelkeenkeepkneeleeleechleekleerleveelicheemanateemarqueemeekmeetmeleeneeneedneedlenegligeeoverseeparakeetpedigreepeepeekpeelpeeppeerpeevepeeweepreemiepreemptpreenproceedprotegeepureequeenqueerreedreefreeferreekreelrefereerefugeerupeesateenscreescreechscreenseeseedseekseemseenseepseerseesawseethesheensheepsheersheetskeetsleeksleepsleetsleevesneersneezespeechspeedspleenspreesqueegeesqueezesteedsteelsteepsteeplesteersteeragestreetsucceedsweepsweetteeteemteenteethteethetepeetheethreetoffeetoupeetreetureentweedtweettweezerveejayveerveneerweeweedweekweenweepweevilwheewheedlewheelwheezeyippee
Some words that have UU in them are:continuummuumuuresiduumvacuum
Here is list of words with a double 'V'chivviedchivvieschivvychivvyingcivviescivvydivvieddivviesdivvydivvyingflivverflivversnavviesnavvyrevvedrevvingsavviedsavviersavviessavviestsavvysavvyingskivviedskivviesskivvyskivvyingSome of these words are rarely used, or are only used in limited circumstances.
double entendre