chatterer vs chatter

chatterer and chatter both are nouns.

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

chatterer (noun)	chatter (noun)
passerine bird of New World tropics	noisy talk
an obnoxious and foolish and loquacious talker	the high-pitched continuing noise made by animals (birds or monkeys)
	the rapid series of noises made by the parts of a machine

chatterer (verb)	chatter (verb)
	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