orator vs rhetorician

orator and rhetorician both are nouns.

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

As nouns, orator and rhetorician are synonyms defined as:

Other synonyms of orator include public speaker, speechifier, speechmaker.

orator (noun)	rhetorician (noun)
a person who delivers a speech or oration	a person who delivers a speech or oration