chatterer vs chatterbox

chatterer and chatterbox both are nouns.

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

As nouns, chatterer and chatterbox are synonyms defined as:

chatterer and chatterbox: an obnoxious and foolish and loquacious talker

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

chatterer (noun)	chatterbox (noun)
passerine bird of New World tropics	an obnoxious and foolish and loquacious talker
an obnoxious and foolish and loquacious talker	orchid growing along streams or ponds of western North America having leafy stems and 1 greenish-brown and pinkish flower in the axil of each upper leaf