confabulate vs chat

confabulate is not a noun while chat is a noun.

Word	Noun	Adjective	Verb	Adverb
confabulate	No	No	Yes	No
chat	Yes	No	Yes	No

As verbs, confabulate and chat are synonyms defined as:

confabulate and chat: talk socially without exchanging too much information

confabulate (noun)	chat (noun)
	songbirds having a chattering call
	birds having a chattering call
	an informal conversation

confabulate (verb)	chat (verb)
talk socially without exchanging too much information	talk socially without exchanging too much information
have a conference in order to talk something over
unconsciously replace fact with fantasy in one's memory