valedictory address vs valedictory oration

valedictory address and valedictory oration both are nouns.

Word	Noun	Adjective	Verb	Adverb
valedictory address	Yes	No	No	No
valedictory oration	Yes	No	No	No

As nouns, valedictory address and valedictory oration are synonyms defined as:

valedictory address and valedictory oration: a farewell oration (especially one delivered during graduation exercises by an outstanding member of a graduating class)

Other synonyms of valedictory address include valediction, valedictory.

valedictory address (noun)	valedictory oration (noun)
a farewell oration (especially one delivered during graduation exercises by an outstanding member of a graduating class)	a farewell oration (especially one delivered during graduation exercises by an outstanding member of a graduating class)