negotiate vs broker

negotiate is not a noun while broker is a noun.

Word	Noun	Adjective	Verb	Adverb
negotiate	No	No	Yes	No
broker	Yes	No	Yes	No

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

Other hyponyms of negotiate include arbitrate, intercede, intermediate, liaise, mediate, renegociate, renegotiate, bargain, dicker.

negotiate (noun)	broker (noun)
	a businessman who buys or sells for another in exchange for a commission

negotiate (verb)	broker (verb)
discuss the terms of an arrangement	act as a broker
succeed in passing through, around, or over