Double consonants usually indicate a short vowel. Compare "litter" with "liter". In other cases, they exist for what can best be described as historical reasons. English spelling only became standardized after the 18th century.
coffeetoffeecommittee
It determines the pronunciation.
Not many words begin with double letters. A few of those that do start with double letters include aardvark, eel, eerie, llama, ooh, oomph and ooze.
Some ways are to do it by syllables, prefixes/suffixes, double letters, etc.
apple... i cant think of any others... bananna, strawberry, blueberry, blackberrry, ect ect...
Some six letter words that end in double letters:accessacrossapogeebamboobefallboo booboohoobungeebypasscaresscoffeecouleecuckoodecreedegreeduressegressembossenrollentreeexcessgoateeharassHawaiilayofflycheemorassmuumuupayoffpeeweepizazzrebuffrecallrecessrefillremissripoffrunoffscrollscruffsetteeshrillsoireesquallstressstrolltarifftattoothrilltoffeetoupeeunlessvoodoo
well, the words hajj or hajji would be umpressive on a double or triple word
Some non-hyphenated English words with consecutive double letters:# allottee # appellee# assessee# balloon# bookkeeping/bookkeeper # committee # cooee (British colloquial)# heelless# keenness # toolless
They are just odd words in the English language that don't apply to some of the rules.
ill, inn, add, ass, all, Ann, odd, off, ebb, err, egg For example
Some words that begin with the letters folio: foliolate. foliose. And, some words that end with the letters folio: portfolio.
Some words that end with the letters IT are:acquitadmitadroitauditbaitbanditbenefitbitcircuitcockpitcommitcomplicitconceitconduitcounterfeitcreditculpritdebitdeceitdeficitdemeritdepositdigiteditelicitemitexhibitexitexplicitexploitfitflitforfeitfruitgaitgambitgrithabithermithitillicitimplicitinhabitinheritinhibitkitknitlimitlitmeritnitomitorbitparfaitpermitpitplaitportraitprofitprohibitpulpitpursuitquitrabbitrecruitremitsitskitslitsnitspiritspitsplitstraitsubmitsuitsummittacittidbittraitTransittransmittwitunitvisitvomitwaitwhitwitwritwhodunit...