Nouns

(n)beginning, commencement, first, outset, get-go, start, kickoff, starting time, showtime, offsetthe time at which something is supposed to begin“they got an early start”, “she knew from the get-go that he was the man for her”
(n)commencement, commencement exercise, commencement ceremony, graduation, graduation exercisean academic exercise in which diplomas are conferred
(n)beginning, start, commencementthe act of starting something“he was responsible for the beginning of negotiations”