prate vs chatter

prate and chatter both are nouns.

Word	Noun	Adjective	Verb	Adverb
prate	Yes	No	Yes	No
chatter	Yes	No	Yes	No

As nouns, chatter is a hypernym of prate; that is, chatter is a word with a broader meaning than prate:

Other hypernyms of prate include cackle, yack, yak, yakety-yak.

As verbs, prate and chatter are synonyms defined as:

prate and chatter: speak (about unimportant matters) rapidly and incessantly

Other synonyms of prate include blab, blabber, clack, gabble, gibber, maunder, palaver, piffle, prattle, tattle, tittle-tattle, twaddle.

prate (noun)	chatter (noun)
idle or foolish and irrelevant talk	noisy talk
	the high-pitched continuing noise made by animals (birds or monkeys)
	the rapid series of noises made by the parts of a machine

prate (verb)	chatter (verb)
speak (about unimportant matters) rapidly and incessantly	speak (about unimportant matters) rapidly and incessantly
	talk socially without exchanging too much information
	make noise as if chattering away
	cut unevenly with a chattering tool
	click repeatedly or uncontrollably