negotiation vs dialogue

negotiation and dialogue both are nouns.

Word	Noun	Adjective	Verb	Adverb
negotiation	Yes	No	No	No
dialogue	Yes	No	No	No

As nouns, negotiation and dialogue are synonyms defined as:

Other synonyms of negotiation include talks.

negotiation (noun)	dialogue (noun)
the activity or business of negotiating an agreement; coming to terms	the lines spoken by characters in drama or fiction
a discussion intended to produce an agreement	a conversation between two persons
	a literary composition in the form of a conversation between two people
	a discussion intended to produce an agreement