nominating speech vs oratory

nominating speech and oratory both are nouns.

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

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

nominating speech: an address (usually at a political convention) proposing the name of a candidate to run for election
oratory: addressing an audience formally (usually a long and rhetorical address and often pompous)

nominating speech (noun)	oratory (noun)
an address (usually at a political convention) proposing the name of a candidate to run for election	addressing an audience formally (usually a long and rhetorical address and often pompous)