confab vs hash out

confab is a noun but hash out is not a noun.

Word	Noun	Adjective	Verb	Adverb
confab	Yes	No	Yes	No
hash out	No	No	Yes	No

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

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

Other hypernyms of confab include discuss, talk over.

confab (noun)	hash out (noun)
an informal conversation

confab (verb)	hash out (verb)
talk socially without exchanging too much information	speak with others about (something); talk (something) over in detail; have a discussion
have a conference in order to talk something over