Initiation is the process of introducing someone to a new role or activity. INVESTITURE is the formal ceremony of investing someone with a rank, office, or title. RITE is a religious or other solemn ceremony. COMMENCEMENT is the BEGINNING or start of something. INCEPTION is the BEGINNING or start of something. INAUGURAL is relating to or marking the BEGINNING of a new venture or period. BAPTISM is a Christian ceremony of ADMISSION to the church. BEGINNING is the point in time or space at which something starts. INAUGURATION is the ceremony of admitting someone to office. ADMISSION is the act of allowing someone to enter a place or organization. INDUCTION is the action or process of bringing someone into an organization or position. ONSET is the BEGINNING or start of something.