chatter vs chatterer

chatter and chatterer both are nouns.

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

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

chatter (verb)	chatterer (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