keynote speech vs oratory

keynote speech and oratory both are nouns.

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

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

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

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