driveller vs verbalizer

driveller and verbalizer both are nouns.

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

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

driveller: someone whose talk is trivial drivel
verbalizer: someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)

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

driveller (noun)	verbalizer (noun)
someone whose talk is trivial drivel	someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)
a person who dribbles