negociate vs bargain

negociate is not a noun while bargain is a noun.

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

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

Other hyponyms of negociate include arbitrate, intercede, intermediate, liaise, mediate, renegociate, renegotiate, dicker, broker.

negociate (noun)	bargain (noun)
	an agreement between parties (usually arrived at after discussion) fixing obligations of each
	an advantageous purchase

negociate (verb)	bargain (verb)
discuss the terms of an arrangement	come to terms; arrive at an agreement
confer with another in order to come to terms or reach an agreement	negotiate the terms of an exchange
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