Begin, commence, initialize
Beginning, commencement
Jump, flinch
start from the beginning
case
Words that mean the same as the word 'beginning' are: start, origin, outset, onset, inception, source...
Wise, whiz
The two words mean the same thing.
words that mean the same as also
there are not many words that start with E that mean peace but i found equanimity on synonym.com
The two words you’re looking for are "big" and "colossal." Both words describe something that is large in size or extent.
Some words are sanitation and sanitize but they mean the exact same thing.
Large, stupendous, gigantic, -- all the words you find on a movie advert. Otherwise, a dictionary of synonyms and antonyms will be a good start, as will be a thesaurus.
A
Some longer than average words that start and end with the same letter are:straightforwardnessexperiencemilitarismmulticulturalismexterminatesuperfluousnesscatastrophicarachnophobiacharacteristicdecaffeinateddisenfranchisedexcommunicategrandstandinggroundbreakinglackadaisicalnationalizationnewspaperwomanproprietorshipspontaneousnesstranscendentalisttranscriptionist