1) Apopemptic 2) Exaugural 3) Oration 4) Speech 5) Valediction 1) Farewell 2) Farewell address 3) Leave 4) Leave-taking 5) Parting 
• (n.) A valedictory oration or address spoken at commencement in American colleges or seminaries by one of the graduating class, usually by the leading scholar. • (a.) Bidding farewell; suitable or designed for an occasion of leave-taking; as, a valedictory oration.
Val`e·dic'to·ry adjective Bidding farewell; suitable or designed for an occasion of leave-taking; as, a valedictory oration. 
[adj] - of or relating to an occasion or expression of farewell
valedictory 1. Uttered or bestowed in bidding or on taking farewell; of the nature of a valediction. 2. A statement or speech made by way of valediction on leaving a position, person, etc.; a farewell speech; especially, one delivered by a valedictorian at commencement exercises.
adjective of a speech expressing leave-taking; `a valedictory address`
[SAT terms] of or relating to an occasion or expression of farewell