talk over vs talk about

talk over and talk about both are verbs.

Word	Noun	Adjective	Verb	Adverb
talk over	No	No	Yes	No
talk about	No	No	Yes	No

As verbs, talk about is a hypernym of talk over; that is, talk about is a word with a broader meaning than talk over:

talk over: speak with others about (something); talk (something) over in detail; have a discussion
talk about: discuss or mention

Other hypernyms of talk over include talk of.

talk over (verb)	talk about (verb)
speak with others about (something); talk (something) over in detail; have a discussion	to consider or examine in speech or writing
	discuss or mention