confab vs small talk

confab and small talk both are nouns.

Word	Noun	Adjective	Verb	Adverb
confab	Yes	No	Yes	No
small talk	Yes	No	No	No

As nouns, small talk is a hyponym of confab; that is, small talk is a word with a more specific, narrower meaning than confab:

confab (noun)	small talk (noun)
an informal conversation	light informal conversation for social occasions

confab (verb)	small talk (verb)
talk socially without exchanging too much information
have a conference in order to talk something over