keynote address vs oratory

keynote address and oratory both are nouns.

Word	Noun	Adjective	Verb	Adverb
keynote address	Yes	No	No	No
oratory	Yes	No	No	No

As nouns, oratory is a hypernym of keynote address; that is, oratory is a word with a broader meaning than keynote address:

keynote address: a speech setting forth the keynote
oratory: addressing an audience formally (usually a long and rhetorical address and often pompous)

keynote address (noun)	oratory (noun)
a speech setting forth the keynote	addressing an audience formally (usually a long and rhetorical address and often pompous)