confab vs discourse

confab and discourse both are nouns.

Word	Noun	Adjective	Verb	Adverb
confab	Yes	No	Yes	No
discourse	Yes	No	Yes	No

As verbs, discourse is a hypernym of confab; that is, discourse is a word with a broader meaning than confab:

Other hypernyms of confab include converse.

confab (noun)	discourse (noun)
an informal conversation	an extended communication (often interactive) dealing with some particular topic
	extended verbal expression in speech or writing
	an address of a religious nature (usually delivered during a church service)

confab (verb)	discourse (verb)
talk socially without exchanging too much information	talk at length and formally about a topic
have a conference in order to talk something over	carry on a conversation
	to consider or examine in speech or writing