chatterer vs babbler

chatterer and babbler both are nouns.

Word	Noun	Adjective	Verb	Adverb
chatterer	Yes	No	No	No
babbler	Yes	No	No	No

As nouns, chatterer and babbler are synonyms defined as:

Other synonyms of chatterer include chatterbox, magpie, prater, spouter.

chatterer (noun)	babbler (noun)
passerine bird of New World tropics	any of various insectivorous Old World birds with a loud incessant song; in some classifications considered members of the family Muscicapidae
an obnoxious and foolish and loquacious talker	an obnoxious and foolish and loquacious talker