commencement

(noun) the time at which something is supposed to begin. Synonyms: beginning, first, outset, get-go, start, kickoff, starting time, showtime, offset. Examples: "They got an early start." "She knew from the get-go that he was the man for her."

(noun) an academic exercise in which diplomas are conferred. Synonyms: commencement exercise, commencement ceremony, graduation, graduation exercise.

(noun) the act of starting something. Synonyms: beginning, start. Examples: "He was responsible for the beginning of negotiations."