conversationalist vs verbalizer

conversationalist and verbalizer both are nouns.

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

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

conversationalist: someone skilled at conversation
verbalizer: someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)

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

conversationalist (noun)	verbalizer (noun)
someone skilled at conversation	someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)