rhetorician vs verbalizer

rhetorician and verbalizer both are nouns.

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

As nouns, verbalizer is a hypernym of rhetorician; that is, verbalizer is a word with a broader meaning than rhetorician:

rhetorician: a person who delivers a speech or oration
verbalizer: someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)

Other hypernyms of rhetorician include speaker, talker, utterer, verbaliser.

rhetorician (noun)	verbalizer (noun)
a person who delivers a speech or oration	someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)