discuss vs confab

discuss is not a noun while confab is a noun.

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

As verbs, confab is a hyponym of discuss; that is, confab is a word with a more specific, narrower meaning than discuss:

discuss: speak with others about (something); talk (something) over in detail; have a discussion
confab: have a conference in order to talk something over

discuss (noun)	confab (noun)
	an informal conversation

discuss (verb)	confab (verb)
speak with others about (something); talk (something) over in detail; have a discussion	talk socially without exchanging too much information
to consider or examine in speech or writing	have a conference in order to talk something over