intermediator vs mediator

intermediator and mediator both are nouns.

Word	Noun	Adjective	Verb	Adverb
intermediator	Yes	No	No	No
mediator	Yes	No	No	No

As nouns, intermediator and mediator are synonyms defined as:

intermediator and mediator: a negotiator who acts as a link between parties

Other synonyms of intermediator include go-between, intercessor, intermediary.

intermediator (noun)	mediator (noun)
a negotiator who acts as a link between parties	a negotiator who acts as a link between parties