peacemaker vs intermediator

peacemaker and intermediator both are nouns.

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

As nouns, intermediator is a hypernym of peacemaker; that is, intermediator is a word with a broader meaning than peacemaker:

Other hypernyms of peacemaker include go-between, intercessor, intermediary, mediator.

peacemaker (noun)	intermediator (noun)
someone who tries to bring peace	a negotiator who acts as a link between parties