conciliator vs go-between

conciliator and go-between both are nouns.

Word	Noun	Adjective	Verb	Adverb
conciliator	Yes	No	No	No
go-between	Yes	No	No	No

As nouns, go-between is a hypernym of conciliator; that is, go-between is a word with a broader meaning than conciliator:

Other hypernyms of conciliator include intercessor, intermediary, intermediator, mediator.

conciliator (noun)	go-between (noun)
someone who tries to bring peace	a negotiator who acts as a link between parties