negotiate vs talk over

negotiate and talk over both are verbs.

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

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

negotiate: discuss the terms of an arrangement
talk over: speak with others about (something); talk (something) over in detail; have a discussion

Other hypernyms of negotiate include discuss, hash out.

negotiate (verb)	talk over (verb)
discuss the terms of an arrangement	speak with others about (something); talk (something) over in detail; have a discussion
succeed in passing through, around, or over