driveller vs verbaliser

driveller and verbaliser both are nouns.

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

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

driveller: someone whose talk is trivial drivel
verbaliser: 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, verbalizer.

driveller (noun)	verbaliser (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