orator vs elocutionist

orator and elocutionist both are nouns.

Word	Noun	Adjective	Verb	Adverb
orator	Yes	No	No	No
elocutionist	Yes	No	No	No

As nouns, elocutionist is a hyponym of orator; that is, elocutionist is a word with a more specific, narrower meaning than orator:

orator: a person who delivers a speech or oration
elocutionist: a public speaker trained in voice production and gesture and delivery

Other hyponyms of orator include eulogist, panegyrist, haranguer, spellbinder, tub-thumper.

orator (noun)	elocutionist (noun)
a person who delivers a speech or oration	a public speaker trained in voice production and gesture and delivery