broker vs negociate

broker is a noun but negociate is not a noun.

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

As verbs, negociate is a hypernym of broker; that is, negociate is a word with a broader meaning than broker:

Other hypernyms of broker include negotiate, talk terms.

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

broker (verb)	negociate (verb)
act as a broker	discuss the terms of an arrangement
	confer with another in order to come to terms or reach an agreement
	succeed in passing through, around, or over
	transfer by endorsement to another in return for value received
	sell or discount
	be successful; achieve a goal