chatterer vs prater

chatterer and prater both are nouns.

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

As nouns, chatterer and prater are synonyms defined as:

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

chatterer (noun)	prater (noun)
passerine bird of New World tropics	an obnoxious and foolish and loquacious talker
an obnoxious and foolish and loquacious talker