jabberer vs talker

jabberer and talker both are nouns.

Word	Noun	Adjective	Verb	Adverb
jabberer	Yes	No	No	No
talker	Yes	No	No	No

As nouns, talker is a hypernym of jabberer; that is, talker is a word with a broader meaning than jabberer:

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

Other hypernyms of jabberer include speaker, utterer, verbaliser, verbalizer.

jabberer (noun)	talker (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)