valedictory oration vs valedictory address

valedictory oration and valedictory address both are nouns.

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

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

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

Other synonyms of valedictory oration include valediction, valedictory.

valedictory oration (noun)	valedictory address (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)