schmoose vs chatter

schmoose and chatter both are nouns.

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

As verbs, chatter is a hypernym of schmoose; that is, chatter is a word with a broader meaning than schmoose:

schmoose (noun)	chatter (noun)
an informal conversation	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

schmoose (verb)	chatter (verb)
talk idly or casually and in a friendly way	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