DECIDE
Some words that begin and end with the same letter and contain CA are:abracadabraacaciaacademiaalpacabicarbcarcinogenicdecaffeinateddecanteddecapoddecayeddedicateddefecateddesiccateddiscarddislocatedduplicatededucateencapsulateencaseequivocateeradicateescalateescapadeescapeescaroleevocativeexcavateexcommunicateexplicateextricatelackadaisicalliturgicallocallogicallogisticallyricalmacadamminicamnotificationnullificationscabiesscalesscallopstelecasttomcattoxicanttypecast
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 words that begin with the letters Ta:TabTableTackleTacoTactTagTailTailorTakeTalcTaleTalentTallTambourineTameTangerineTangleTangoTankTapeTapestryTareTargetTaroTarotTarTaskTasteTatTaterTattooTaxiTaxTavern
Six letter words that start with the letters wh:whackowhackswhackywhaleswhammywharfswheelswheezewheezywhencewhinedwhinerwhippywhirlswhiskywhiterwholly
11 letter words that begin and end with the same letter:charismaticdisappeareddiscrediteddistributedgalvanizinggerminatingseriousnesstranslucenttransparent
Some words that begin with the letters folio: foliolate. foliose. And, some words that end with the letters folio: portfolio.
Some words that begin and end with the same letter and contain CA are:abracadabraacaciaacademiaalpacabicarbcarcinogenicdecaffeinateddecanteddecapoddecayeddedicateddefecateddesiccateddiscarddislocatedduplicatededucateencapsulateencaseequivocateeradicateescalateescapadeescapeescaroleevocativeexcavateexcommunicateexplicateextricatelackadaisicalliturgicallocallogicallogisticallyricalmacadamminicamnotificationnullificationscabiesscalesscallopstelecasttomcattoxicanttypecast
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 words that begin with 'asc' are:ascendascertainasceticascorbicascotascribe
At and the
Some words that begin with the letters Ta:TabTableTackleTacoTactTagTailTailorTakeTalcTaleTalentTallTambourineTameTangerineTangleTangoTankTapeTapestryTareTargetTaroTarotTarTaskTasteTatTaterTattooTaxiTaxTavern
Kiss miss
suddensuddenlysuddennesssudssudsiersudsiestsudsy
acknowledgeawkwardaskankletankleark
Llama and llamas are words. They are the only words I could find that begin with LL.
Agriculture and Agro industrial
There can be words beginning with different letters without ruining the alliteration, but the more words that do start with the same letter, the stronger the alliteration.